friend

Unfortunate is he who cannot gain a few sincere friends during his life and more unfortunate is the one who has gained them and then lost them (through his deeds).

wealth

The best kind of wealth is to give up inordinate desires.

humanity

You must not lose faith in humanity. Humanity is an ocean; if a few drops of the ocean are dirty, the ocean does not become dirty.

change

If you don't like something, change it. If you can't change it, change your attitude.

change

Any change, even a change for the better, is always accompanied by drawbacks and discomforts.

differences

Honest differences are often a healthy sign of progress

Freedom

Freedom is not worth having if it does not include the freedom to make mistakes