Joseph Smith

“We should take warning and not wait for the death-bed to repent; as we see the infant taken away by death, so may the youth and middle aged, as well as the infant be suddenly called into eternity. Let this, then, prove as a warning to all not to procrastinate repentance, or wait till a death-bed, for it is the will of God that man should repent and serve Him in health, and in the strength and power of his mind, in order to secure His blessing, and not wait until he is called to die” (Teachings of Presidents of the Church: Joseph Smith, p. 73).