"Instruction does not prevent wasted time or mistakes; and mistakes themselves are often the best teachers of all."

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This world is your best teacher. There is a lesson in everything. There is a lesson in each experience. Learn it and become wise. Every failure is a stepping stone to success. Every difficulty or disappointment is a trial of your faith. Every unpleasant incident or temptation is a test of your inner strength. Therefore nil desperandum. March forward hero!

— Sivananda