"Is the soul, then, immortal?"
"Immortal."
[126]. "Be it so," he said. "Shall we say, then, that this has been now demonstrated? or how think you?"
"Most completely, Socrates."
"What, then," said he, "Cebes, if it were necessary for the uneven to be imperishable, would the number three be otherwise than imperishable?"
"How should it not?"
"If, therefore, it were also necessary that what is without heat should be imperishable, when any one should introduce heat to snow, would not the snow withdraw itself, safe and unmelted? For it would not perish; nor yet would it stay and admit the heat."
"You say truly," he replied.
"In like manner, I think, if that which is insusceptible of cold were imperishable, that when any thing cold approached the fire, it would neither be extinguished nor perish, but would depart quite safe."