He who pays no attention to what his neighbor does, says or thinks, preferring to concentrate on making his own actions appropriate and justifiable, better uses his time.
Marcus AureliusBecause a thing seems difficult for you, do not think it impossible for anyone to accomplish.
Marcus AureliusA man should always have these two rules in readiness. First, to do only what the reason of your ruling and legislating faculties suggest for the service of man. Second, to change your opinion whenever anyone at hand sets you right and unsettles you in an opinion, but this change of opinion should come only because you are persuaded that something is just or to the public advantage, not because it appears pleasant or increases your reputation.
Marcus Aurelius