Sometimes in life, things happen that will knock you back. Hell, you may get beaten to your knees but you must never ALLOW this world to knock you down! Conjure up all the strength you have and drive through whatever it is keeping you on your knees. Build up the strength and your knees may never buckle again!
I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success ... Such emotions make a man forget food, sleep, friends, love, everything.
You are not here merely to make a living. You are here in order to enable the world to live more amply, with greater vision, with a finer spirit of hope and achievement. You are here to enrich the world, and you impoverish yourself if you forget the errand.