Vishnupurana 2.13.p10

2.13.p10

The king said:—"That virtue and vice are the causes of all actions and that people migrate into various bodies for receiving their consequences, there is not the least doubt about it; but as regards what you have said that it is not possible for you to say who you are, it is a matter which I wish to have explained. O Brahman, how cannot a man declare himself to be that which he (really) is: there can be no harm to one's self from applying to it the word 'I'".