"This provides us with our first major clue to the solutions of the problem. Even if the left cannot see the world as full of potentiality, it can hold on to the moments of insight and refuse to let go of them. If I know that present difficulties will end in triumph, I am un-discourageable; I merely have to know it intellectually. And if I can 'know' that reality actually has a third dimension, I shall never fall into the mistake of complaining that there is nothing new under the sun and that life is futile."