Remembrance of Krishna is not possible for the impure soul who has not practiced Krishna consciousness in devotional service. Therefore, one should practice Krishna consciousness from the very beginning of life. If one wants to achieve success at the end of his life, the process of remembering Krishna is essential. Therefore, one should constantly, incessantly chant the Maha-Mantra — Hare Krishna Hare Krishna Krishna Krishna Hare Hare, Hare Rama Hare Rama Rama Rama Hare Hare. — Bhagavad Gita As it is, 08.05.
The Krishna Consciousness movement is the unique gift of Lord Chaitanya to the fallen souls of this age.
Krishna – The Supreme Personality of Godhead
There is no question of darkness where there is light and Krishna consciousness is light that dispels the darkness of material sense enjoyment.
Srila Prabhupada in his book Teaching of Lord Chaitanya