Seneca

The greatest loss of time is delay and expectation, which depend upon the future. We let go the present, which we have in our power, and look forward to that which depends upon chance, and so relinquish a certainty for an uncertainty.

It is sometimes pleasant even to act like a madman. -Aliquando et insanire iucundum est

It is better, of course, to know useless things than to know nothing.

Things that were hard to bear are sweet to remember.

The true felicity of life is to be free from anxieties and perturbations; to understand and do our duties to God and man, and to enjoy the present without any serious dependence on the future.

Truth never perishes.

The greatest wealth is a poverty of desires.

The primary sign of a well-ordered mind is a man's ability to remain in one place and linger in his own company.

What difference does it make how much you have? What you do not have amounts to much more.

Wisdom does not show itself so much in precept as in life - in firmness of mind and a mastery of appetite. It teaches us to do as well as to talk; and to make our words and actions all of a color.