To know oneself, one should assert oneself.

It's always too early to quit.

Things do not happen. Things are made to happen.

Always desire to learn something useful.

By failing to prepare, you are preparing to fail.

Do not weep do not wax indignant. Understand.

If you're going through hell, keep going.

I can, therefore I am.

The wise does at once what the fool does at last.