If better is possible, good is not enough

Great talkers, little doers.

If you can't pay for a thing, don't buy it. If you can't get paid for it, don't sell it. Do this, and you will have calm and drowsy nights, with all of the good business you have now and none of the bad. If you have time, don't wait for time.

Prodigality of Time produces Poverty of Mind as well as of Estate.

Is there anything men take more pains about than to render themselves unhappy?

When confronted with two courses of action I jot down on a piece of paper all the arguments in favor of each one, then on the opposite side I write the arguments against each one. Then by weighing the arguments pro and con and cancelling them out, one against the other, I take the course indicated by what remains.

Praise to the undeserving is severe satire.