Knowledge without courage is sterile.
Friendship multiplies blessings and...soothes the soul.
Leave your luck while still winning.
There are certain inessential activities-moths of precious time-and it is worse to busy yourself with the trivial than to do nothing.
Nature often lets us down when we most need her; let us turn to art.
Know how to choose well. Most of life depends thereon. It needs good taste and correct judgment, for which neither intellect nor study suffices.