Be yourself, don't change yourself to please others.
Three things are necessary for the salvation of man: to know what he ought to believe； to know what he ought to desire； and to know what he ought to do.
The secret of change is to focus all of your energy not on fighting the old, but on building the new.
Loneliness is the poverty of self; solitude is the richness of self.
The past is always tense, the future perfect.
Nothing is really beautiful but truth, truth alone is lovely.