1.your best teacher is your last mistake.
2.if yo do right no one remembers,if you do wrong no one forgets.
3.limits exist only in mind.
4.destroy what destroys you 

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One language sets you in a corridor for life. Two languages open every door along the way.
The limits of my language are the limits of my world.
Learning is a treasure that will follow its owner everywhere.
Language is the blood of the soul into which thoughts run and out of which they grow.