To know oneself, one should assert oneself.
Be gentle to all and stern with yourself.
Do not weep do not wax indignant. Understand.
Well done is better than well said.
I can, therefore I am.
Know or listen to those who know.
By failing to prepare, you are preparing to fail.
Always desire to learn something useful.
The wise does at once what the fool does at last.
If you're going through hell, keep going.
Nothing has caused the human race so much trouble as intelligence.