Man can only be certain about the present moment. But is that quite true either? Can he really know the present? Is he in a position to make any judgment about it? Certainly not. For how can a person with no knowledge of the future understand the meaning of the present? If we do not know what future the present is leading us toward, how can we say whether this present is good or bad, whether it deserves our concurrence, or our suspicion, or our hatred?