When we focus our minds on sensory input from the external world or on thoughts and feelings that arise within us, we are engaged in a type of meditation, in the broadest sense of that word. So you could say that all of us are already meditating at every moment.
 The mind is always busy: It can’t be stopped. Meditation and yoga are for helping us rise above the mind’s chatter. What we meditate on now creates our future life.

A person in bodily consciousness constantly thinks of eating, sleeping, sex, and self-protection or of things related to these four basic activities.

Mantra meditation is what the Vedas prescribe for this day and age. The single most highly recommended mantra—with the greatest ability to uplift our consciousness—is:

Hare Krishna Hare Krishna  Krishna Krishna Hare Hare 
Hare Rama Hare Rama Rama  Rama Hare Hare ||

Hare Krishna  mahamantra is known to maximum number of  western seekers thanks to the commendable work done by His Divine Grace A C Bhaktivedanta Swami Prabhupada (founder of  ISKCON - International Society for Krishna Consciousness  in spreading its awareness world wide.  George Harrison, the popular singer of world famous Beatles group also devoted his entire life in spreading the  awareness about this mantra. 
"A mantra is mystical energy encased in a sound structure and each mantra contains within its vibrations a certain power. But of all mantras, the maha-mantra (the Hare Krishna mantra) has been prescribed as the easiest and surest way for attaining God Realization in this present age."  --George Harrison (1943-2001),  in his autobiography :'I, me and Mine'
This mantra is known as the Maha-mantra of Kaliyuga (the supreme mantra of Kaliyuga - the present era of machine where truth and righteousness are at their lowest level. ) It has been said that by repeating this mantra with faith and devotion, one can attain salvation and peace of mind.  

          " harer nama harer nama harer namaiva kevalam
         kalau nasty eva nasti eva nasti eva gatir anyatha" 

              - A Sanskrit verse from Brhan-naradiya Purana which means        
   "In this age of Kali, there is no alternative, there is no alternative, there is no alternative for spiritual progress other than the chanting of the holy name, the chanting of the holy name, the chanting of the holy name of the Lord."      
The meaning of Hare Krishna Mantra:

 The mantra is a spiritual call to the Lord, meaning, “Oh energy of the Lord, please engage me in the loving service of Lord Krishna.”

This transcendental vibration, by chanting of Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare Hare Rama, Hare Rama, Rama Rama, Hare Hare is the sublime method for reviving our Krishna consciousness.
As living spiritual souls we are all originally Krishna conscious entities, but due to our association with matter from time immemorial, our consciousness is now polluted by material atmosphere. In this polluted concept of life, we are all trying to exploit the resources of material nature, but actually we are becoming more and more entangled in her complexities. This illusion is called maya, or hard struggle for existence for winning over the stringent laws of material nature. This illusory struggle against the material nature can at once be stopped by revival of our Krishna consciousness.

Krishna consciousness is not an artificial imposition on the mind. This consciousness is the original energy of the living entity. When we hear the transcendental vibration, this consciousness is revived and the process is recommended by authorities for this age. By practical experience also, we can perceive that by chanting this maha-mantra, or the great chanting for deliverance, one can at once feel transcendental ecstasy from the spiritual stratum.

When one is factually on the plane of spiritual understanding, surpassing the stages of sense, mind and intelligence, one is situated on the transcendental plane. This chanting of Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare, Hare Rama, Hare Rama, Rama Rama, Hare Hare is directly enacted from the spiritual platform, surpassing all lower status of consciousness, namely sensual, mental, and intellectual.

There is no need of understanding the language of the mantra, nor is there any need of mental speculation, nor any intellectual adjustment for chanting this maha-mantra. It springs automatically from the spiritual platform, and as such, anyone can take part in this transcendental sound vibration without any previous qualification and dance in ecstasy. We have seen it practically. Even a child can take part in the chanting, or even a dog can take part in it.

This chanting should be heard from the lips of a pure devotee of the Lord so that immediate effect can be achieved. As far as possible, chanting from the lips of a non-devotee should be avoided, as much as milk touched by the lips of a serpent causes poisonous effect.

The word Hara is a form of addressing the energy of the Lord. Both Krishna and Rama are forms of addressing directly the Lord and they mean, "the highest pleasure eternal." Hara is the supreme pleasure potency of the Lord. This potency, when addressed as Hare, helps us in reaching the Supreme Lord.

The material energy, called maya, is also one of the multi-potencies of the Lord, as much as we are also marginal potency of the Lord. The living entities are described as superior energy than matter. When the superior energy is in contact with the inferior energy, it becomes an incompatible situation. But when the supreme marginal potency is in contact with the spiritual potency, Hara, it becomes the happy, normal condition of the living entity.

The three words, namely Hara, Krishna, and Rama, are transcendental seeds of the maha-mantra, and the chanting is a spiritual call for the Lord and His internal energy Hara for giving protect the conditioned soul. This chanting is exactly like the genuine cry of a child for its mother. Mother Hara helps the devotee achieve the grace of the Supreme Father, Hari or Krishna, and the Lord reveals Himself to the devotee who chants this mantra sincerely.

Therefore no other means of spiritual realization is as effective in this age of quarrel and hypocrisy as the chanting of the maha-mantra: Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare, Hare Rama, Hare Rama, Rama Rama, Hare Hare.

Benefits of Mantra Meditation:


If the mind is not controlled, we will be end up in doing something nonsense or loose control on ourselves as mentioned in the above pictures. But the good news is that everyone can gain control over the mind from the mantra meditation, and you don't need to be an 'expert'. We can categorise mantra meditation benefits under physical, emotional, mental and spiritual benefits so that you can see how meditation has great advantages upon all levels of our being. But remember, to gain lasting benefits from mantra meditation you need to practice it regularly, ideally every day.
Did you know that people who meditate are scientifically proven to be happier and healthier? It’s true. And they have greatly extended life spans, too. As a matter of fact, there have been numerous studies showing that meditation dramatically reduces, and even reverses disease of all types. 

But the benefits of mantra meditation don’t stop there. Studies also show that experienced mantra meditators – those who are able to achieve the deepest levels of meditative states – are able to tap into dormant levels of brain function they never thought possible – levels of function that exist in each and every one of us – resulting in increased intelligence, creativity, and success in life. 
Mantra Meditation is also known for providing its practitioners with superior mental and emotional health, it rids our minds of subconscious layers of anger, depression, anxiety, fear, phobias, and sadness, and produces a seemingly perfect mental and emotional balance. 

If that was not enough, people who meditate are also known to have more friends, maintain healthier relationships, and feel a great deal more satisfied and content with their lives. 
With so many benefits of meditation, we have split them up into 4 categories.