Happiness belongs to those who are sufficient unto themselves. For all external sources of happiness and pleasure are, by their very nature, highly uncertain, precarious, ephemeral and subject to chance.
Don't let yourself be weighed down by what other people think, because in a few years, in a few decades, or in a few centuries, that way of thinking will have changed. Live now what others will only live in the future.
Disciplining yourself to do what you know is right and important, although difficult, is the highroad to pride, self-esteem, and personal satisfaction.
The most difficult subjects can be explained to the most slow- witted man if he has not formed any idea of them already; but the simplest thing cannot be made clear to the most intelligent man if he is firmly persuaded that he knows already, without a shadow of doubt, what is laid before him.
Tell the truth boldly, whether it hurts or not. Never pander to weakness. If truth is too much for intelligent people and sweeps them away, let them go; the sooner the better.
Just as one candle lights another and can light thousands of other candles, so one heart illuminates another heart and can illuminate thousands of other hearts.
In matters of truth and justice, there is no difference between large and small problems, for issues concerning the treatment of people are all the same.