The default mode of thinking is like an infant's activity centre. You imagine forth a configuration of givens in which a certain piece is missing and then you come up with the missing piece and complete the pattern, at which point the figure resets and a new problem is there for you. Attention is absorbed and you are not aware of any identity beyond the cycle of call and act. The configuations are more or less voluntary or whimsical, the acts are more or less successful, the mood can have many colours. It is strange the way that consciousness seems to fall into the effortless enjoyment of this process.