I have found that the greatest degree of inner peace comes from cultivating love and compassion.
The way to change others' minds is with affection, and not anger.
Learn and obey the rules very well so you will know how to break them properly.
Forget the failures. Keep the lessons.
If you focus only on yourself and neglect others, you will lose; but you will gain if you value others as much as you cherish yourself.
Happiness is not something ready made. It comes from your own actions.