Instead of contemplating what will happen to this world — you have got a short duration of life, say fifty, sixty years — you should chant Hare Krsna and go back to home, back to Godhead. Don’t consider what will happen to this world. Nature will take care of it. Don’t puzzle your brain with these thoughts. You utilize whatever time you have in your possession and go back to home, back to Godhead.

Srila Prabhupada; morning walk in Caracas, February 21, 1975