Everyone teaches you some
lesson or other; learn from
everybody.There is an
ancient proverb in Sanskrit
that says, ‘First salute the
wicked, and then the good.
For the wicked is teaching
you a lesson at his own cost,
and the good walks his own
path and teaches you a
lesson.’

http://www.artofliving.org/in-en/what-sri-sri-said-today