That terrible mood of depression of whether it's any good or not is what is known as The Artist's Reward.Ernest Hemingway
No matter what your mission is, have some notion in your head. Forget the model, whether it's government or nonprofit or profit. Ask yourself the more important question: Is my mission improving the world? Are you sure about it? Seek to disconfirm that all the time. And if you can, change your mission.Jeff Bezos
If anyone offers conjectures about the truth of things from the mere possibility of hypotheses, I do not see by what stipulation anything certain can be determined in any science, since one or another set of hypotheses may always be devised which will appear to supply new difficulties.Isaac Newton
Operations in Iraq and Afghanistan and the war on terrorism have reduced the pace of military transformation and have revealed our lack of preparation for defensive and stability operations. This Administration has overextended our military.Barack Obama