There's an interdependence between flowers and bees. Where there are no flowers there are no bees, and where there are no bees, there are no flowers. They are really one organism. And so in the same way, everything in nature depends on everything else.
Words spoken about the Way have no taste. When looked at, there's not enough to see. When listened to, there's not enough to hear. When used, it is never exhausted.
If you have a great deal of knowledge, but you're governed by negative emotions, then you tend to use your knowledge in negative ways. Therefore, while you are learning, don't forget the importance of warmheartedness.