He who does wrong does wrong against himself. He who acts unjustly acts unjustly to himself, because he makes himself bad.

Limit time to the present. Meditate upon your last hour.

Anything that is beautiful is beautiful just as it is. Praise forms no part of its beauty, since praise makes things neither better nor worse. This applies even more to what it commonly called beautiful: natural objects, for example, or works of art. True beauty has no need of anything beyond itself.

It is the duty of men to love even those who injure them.

Be tolerant with others and strict with yourself.

Light may earth's crumbling sand be laid on thee, that dogs may dig thy bones up easily

Always follow these two rules: first, act only on what your reasoning mind proposes for the good of humanity, and second, change your opinion if someone shows you it's wrong. This change of mind must proceed only from the conviction that it's both correct and for the common good, but not because it will give you pleasure and make you popular.