Science has been seriously retarded by the study of what is not worth knowing and of what is not knowable.

A resolution that is communicated is no longer within thy power; thy attentions become now the plaything of chance; he who would have his commands certainly carried out must take man by surprise.

Keep not standing fixed and rooted. Briskly venture, briskly roam.

It seems to never occur to fools that merit and good fortune are closely united.

Only learn to seize good fortune, for good fortune's always here.

What is hardest of all? That which seems most simple: to see with your eyes what is before your eyes.

True works of art are a manifestation of the higher laws of nature.