When we breathe, we remember that it's the trees that allow us to breathe. When we contemplate a flower, we find that a bit of the cloud that passes over us, is in the flower. When we eat an apple, we can see that the land that feeds the tree, is also part of the apple. When we feel the Sun's heat we know it is no different from the warmth of a human body. Everything is in everything, and everything depends on everything. The apparent separation perceived by us is illusory, resulting from our ignorance of the true nature of things.