As iron is eaten by rust, so are the envious consumed by envy.

Antisthenes

If you would live long, open your heart.

Bulgarian saying

No road is long with good company.

Turkish proverb

Compassion is a muscle that gets stronger with use.

Mahatma Gandhi

No one knows a son better than the father.

Chinese Proverb

Better than a thousand days of diligent study is one day with a great teacher.

Japanese Proverb