The most vulnerable and yet most unconquerable of things is human vanity; nay, through being wounded its strength increases and can grow to giant proportions.

One is honest about oneself either with a sense of shame or with vanity.

If it is true to say of the lazy that they kill time, then it is greatly to be feared that an era which sees its salvation in public opinion, this is to say private laziness, is a time that really will be killed.

Our vanity is hardest to wound precisely when our pride has just been wounded.

Deception, flattering, lying, deluding, talking behind the back, putting up a false front, living in borrowed splendor, wearing a mask, hiding behind convention, playing a role for others and for oneself-in short, a continuous fluttering around the solitary flame of vanity-is so much the rule and the law among men that there is almost nothing which is less comprehensible than how an honest and pure drive for truth could have arisen among them.

The strongest knowledge (that of the total freedom of the human will) is nonetheless the poorest in successes: for it always has the strongest opponent, human vanity.