Trust

Most people in this world can't keep a secret forever, and you always end up trusting someone with something in your life, so that's most likely how you're going to learn this lesson; yet imagine what a different world we as a whole would live in if people could actually have the decency to keep secrets and have trust... But then again there's obsticles in life, such as who to hope won't reveal your secret, or when this person will eventually let your secret out, but once you overcome these obsticles, there's only one lesson that will come out of it; to trust yourself and no one else.