The best calculation is the absence of calculation. Once you have attained a certain level of recognition, others generally figure that when you do something, it's for an intelligent reason. So it's really foolish to plot out your movements too carefully in advance. You're better off acting capriciously.
Pablo PicassoHow could Michelangelo have seen his David in a block of marble? Man began to make images only because he discovered them nearly formed around him, already within reach. He saw them in a bone, in the bumps of a cave, in a piece of wood. One form suggested a woman to him, another a buffalo, still another the head of a monster.
Pablo Picasso