All the things and events we usually consider as irreconcilable, such as cause and effect, past and future, subject and object, are actually just like the crest and trough of a single wave, a single vibration. For a wave, although itself a single event, only expresses itself through the opposites of crest and trough, high point and low point. For that very reason, the reality is not found in the crest nor the trough alone, but in their unity.