Tweet He can who thinks he can, and he can’t who thinks he can’t. This is an inexorable, indisputable law. Quote by Pablo Picasso. You May Also Like...Whatever the mind can conceive and believe, it can achieve.Everything you can imagine is real.Action is the foundational key to all success.Think good, and good follows. Think evil, and evil follows. You are what you think all day long.Thinking is the talking of the soul with itself.Only put off until tomorrow what you are willing to die having left undone.A man is but the product of his thoughts. What he thinks he becomes.What one does is what counts. Not what one had the intention of doing.I am always doing that which I can not do, in order that I may learn how to do it.