Check the season, the weather, and the condition of those who are with you. Just a moment's observation will set you straight about what to eat on any given day. The Yin and Yang concept used in Eastern Medicine basically says that when one is full, the other must be empty. When the stomach is full, the intestines should be empty, and vice versa. Top and bottom must take turns being full and empty.
Truth IS only in relation to something.
As previously mentioned, anger arises only when there is greed. Long ago, a Zenster lay in a boat that drifted down a river. Then, all of a sudden, there was a loud thud next to his head. But there was no one there. It was just an empty boat drifting along that had come crashing into the side of his boat.