'I looked at all friends, and did not find a
better friend than safeguarding the tongue. I
thought about all dresses, but did not find a
better dress than piety. I thought about all
types of wealth, but did not find a better
wealth than contentment in little. I thought of
all types of good deeds, but did not find a
better deed than offering good advice. I
looked at all types of sustenance, but did not
find a better sustenance than patience'.
--Omar ibn Khattab