Be kind whenever possible. It is always possible.
Things do not happen. Things are made to happen.
Always desire to learn something useful.
It's always too early to quit.
Who seeks shall find.
Well done is better than well said.
By failing to prepare, you are preparing to fail.
Never complain and never explain.
Do not weep do not wax indignant. Understand.
I can, therefore I am.
I broke down while at Oxford, was rejected by a record number of medical tribunals during the War, and finally got permission to leave Oxford and do civilian work till the War ended.