By His Divine Grace A. C. Bhaktivedānta Swami Prabhupāda
In this age especially, in Kali-yuga we become very, very slow in spiritual progress. Although that is our main business, but, on account of this Kali-yuga, we are all very, very slow. We think that “Spiritual cultivation is meant for old age. So let us now enjoy our life in this material world.” But that is a wrong conception of life. What do you mean by old age? Nearing death! So who can guarantee that he is not nearing death? Everyone is nearing death at every moment. Why should you wait for old age? That is manda-mater, bad intelligence. We should know that death may take place at any moment. Therefore every one of us is already old. (We) generally understand that old age means nearing death, but who can guarantee that there is no death immediately? At any moment. Therefore śāstra says tūrnam yateta na pateta anu-mrtyu yāvat: Before meeting your next death, you should endeavor so dexterously that you complete your Krishna consciousness before your death comes. That is intelligence. Not that “I am now young man, let me enjoy. And in old age, after passing sixty years, when there will be no other engagement, at that time I shall chant Hare Krishna mantra.” No. Immediately, tūrnam yateta.