How can we learn self-knowledge? Never by taking thought but rather by action. Try to do your duty and you'll soon discover what you're like.

Doesn't surprise me that Christ our Lord preferred to live with whores and sinners, seeing I go in for that myself.

No man learns to know his inmost nature by introspection, for he rates himself sometimes too low, and often too high, by his own measurement. Man knows himself only by comparing himself with other men; it is life that touches his genuine worth.

Strike the dog dead, it's but a critic!

Man... knows only when he is satisfied and when he suffers, and only his sufferings and his satisfactions instruct him concerning himself, teach him what to seek and what to avoid. For the rest, man is a confused creature; he knows not whence he comes or whither he goes, he knows little of the world, and above all, he knows little of himself.

Man's restlessness makes him strive.

He is the happiest man who can see the connection between the end and the beginning of life.