It's always too early to quit.

To know oneself, one should assert oneself.

If you're going through hell, keep going.

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

Things do not happen. Things are made to happen.

I can, therefore I am.

By failing to prepare, you are preparing to fail.

Be thine own palace, or the world's thy jail.

Either you run the day or the day runs you.