Only the heart knows how to find what is precious.

Every man looks out for himself, and he has the happiest life who manages to hoodwink himself best of all.

There is nothing in the world more difficult than candor, and nothing easier than flattery. If there is a hundredth of a fraction of a false note to candor, it immediately produces dissonance, and as a result, exposure. But in flattery, even if everything is false down to the last note, it is still pleasant, and people will listen not without pleasure; with coarse pleasure, perhaps, but pleasure nevertheless.

One's own free and unfettered volition, one's own caprice, however wild, one's own fancy, inflamed sometimes to the point of madness - that is the one best and greatest good, which is never taken into consideration because it cannot fit into any classification and the omission of which sends all systems and theories to the devil.

Human laziness makes people pigeonhole one another at first site so that they find nothing in common with one another.

If you want to overcome the whole world, overcome yourself.

Man has not the right to turn aside and heed not what is happening in the world around him, and this I maintain on moral grounds of the highest order.