“If emotion and fatigue lowered the potency of thought, what raised it? I began to reconsider my moments of delight in terms of this statement of the problem, moments whose essential quality had been a fusing of experience, a flash of significance uniting the meaningless and separate. If one assumed that thinking was a process involving some form of energy, it seemed quite appropriate to imagine my gesture of holding back from mental action as causing an accumulation of energy which automatically raised the potency. By preventing energy from continually flowing away in a noisy stream of efforts and purposes I could make it fill up into a silent pool of clearness.”