What is learned without pleasure is forgotten without remorse.
Your master is he who controls that on which you have set your heart or wish to avoid.
It is unlikely that the good of a snail should reside in its shell: so is it likely that the good of a man should?
If you hear that someone is speaking ill of you, instead of trying to defend yourself you should say: 'He obviously does not know me very well, since there are so many other faults he could have mentioned.'
Don't regard what anyone says of you, for this, after all, is no concern of yours.
To know that you do not know and to be willing to admit that you do not know without sheepishly apologizing is real strength and sets the stage for learning and progress in any endeavor.