When an unbaked pot is broken, the potter can use the mud to make a new one; but when a baked one is broken, he cannot do the same any longer. So when a person dies in a state of ignorance, he is born again; but when he becomes well baked in the fire of true knowledge and dies a perfect man, he is not born again.

p. 46 - Sayings of Sri Ramakrishna (1960)