In this age of quarrel and anxiety (Kali-yuga), Krishna incarnates as His Holy Name. The Vedic scripture Kali-Santarana Upanisad mentions that the best mantra recommended for this age is the Hare Krishna mantra : Hare Krishna Hare Krishna Krishna Krishna Hare Hare, Hare Rama Hare Rama Rama Rama Hare Hare.

Mantra meditation involves repeating the mantra in mood of prayer or as a form of meditation and focusing the mind on the sound vibration of the mantra.

Srila Prabhupada on Chanting (the Hare Krishna Mantra)

The transcendental vibration established by the chanting of the Hare Krishna mantra (Hare Krishna Hare Krishna Krishna Krishna Hare Hare, Hare Rama Hare Rama Rama Rama Hare Hare) is the sublime method of 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 the material atmosphere. The material atmosphere, in which we are now living, is called maya, or illusion. Maya means “that which is not.” And what is this illusion? The illusion is that we are all trying to be lords of material nature, while actually we are under the grip of her stringent laws. When a servant artificially tries to imitate the all-powerful master, this is called illusion. 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. Therefore, although we are engaged in a hard struggle to conquer nature, we are ever more dependent on her. This illusory struggle against material nature can be stopped at once 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 this process is recommended for this age by authorities. By practical experience also, one can perceive that by chanting this maha-mantra, or the Great Chanting for Deliverance, one can at once feel a transcendental ecstasy coming through from the spiritual stratum. And when one is factually on the plane of spiritual understanding – surpassing the stages of senses, mind, and intelligence – one is situated on the transcendental plane.

We have seen this practically. Even a child can take part in the chanting, or even a dog can take part in it. Of course, for one who is too entangled in material life, it takes a little more time to come to the standard point, but even such a materially engrossed man is raised to the spiritual platform very quickly. When the mantra is chanted by a pure devotee of the Lord in love, it has the greatest efficacy on the hearers, and as such, this chanting should be heard from the lips of a pure devotee of the Lord, so that immediate effects can be achieved. As far as possible, chanting from the lips of non-devotees should be avoided. Milk touched by the lips of a serpent has poisonous effects.

The word Hara is the form of addressing the energy of the Lord, and the words Krishna and Rama are forms of addressing the Lord Himself. Both Krishna and Rama mean “the supreme pleasure,” and Hara is the supreme pleasure energy of the Lord, changed to Hare in the vocative. The supreme pleasure energy of the Lord helps us to reach the Lord.

The material energy, called maya, is also one of the multi-energies of the Lord. And we, the living entities, are also the energy – marginal energy – of the Lord. The living entities are described as superior to material energy. When the superior energy is in contact with the inferior energy, an incompatible situation arises; but when the superior marginal energy is in contact with the superior energy, called Hara, the living entity is established in his happy, normal condition.

These three words, namely Hare, Krishna and Rama, are the transcendental seeds of the maha-mantra. The chanting is a spiritual call for the Lord and His internal energy, Hara, to give protection to 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.

No other means of spiritual realization, therefore, is as effective in this age as chanting the maha-mantra: Hare Krishna Hare Krishna Krishna Krishna Hare Hare, Hare Rama Hare Rama Rama Rama Hare Hare.