(Click to enlarge painting of samsara, the cycle of birth and death)
"We do not know when death is coming, especially in these days. We are moving in the street, we are moving by plane, we are moving... Every step, there is danger. Padaṁ padaṁ yad vipadām. It is a place of danger. So our life... We should consider this human form of life, especially Kṛṣṇa conscious life, is very important life. We should not be inattentive. So we should be very careful. Kṛṣṇa will, of course, protect you, but at the same time, we have got consciousness. We should also take care that before the next death comes, we must be fully prepared for being transferred to Kṛṣṇaloka. And it is very simple thing. If you keep yourself constantly in Kṛṣṇa consciousness, that's the only thing. Then you are sure to be going, transferred next life. As I was explaining last night, simply by understanding Kṛṣṇa."
(Srila Prabhupada Lecture, San Francisco, March 10, 1968)