We have a definite but unknown quantity of experience at our disposal. As soon as the hourglass is turned, the sand will begin to run out and once it starts, it cannot stop until it's all gone.
Pablo PicassoEach time I undertake to paint a picture I have a sensation of leaping into space. I never know whether I shall fall on my feet. It is only later that I begin to estimate more exactly the the effect of my work.
Pablo Picasso