There is only one way to happiness and that is to cease worrying about things which are beyond the power of our will.
Make the best use of what is in your power, and take the rest as it happens.
The two powers which in my opinion constitute a wise man are those of bearing and forbearing.
If you have assumed a character beyond your strength, you have both played a poor figure in that, and neglected one that is within your powers. (79).