A wave is made up of other waves. You can discover the relationship between that wave and all the other waves with the principle of cause and effect. But there is another level of relationship, and that is the relationship between the wave and the water. The wave is aware that she is made of the other waves, and at the same time she realizes that she is made of water too. It is very important for her to touch the water, the foundation of her being. She realizes that all the other waves are also made of water.
In Buddhism we speak of the world of phenomena (dharmalakshana). You, me, the trees, the birds, squirrels, the creek, the air, the stars are all phenomena. There is a relationship between one phenomenon and another. If we observe things deeply, we will discover that one thing contains all the other things. If we look deeply into a tree, you will discover that a tree is not only a tree. It is also a person. It is a cloud. It is the sunshine. It is the Earth. It is the animals and the minerals. The practice of looking deeply reveals to us that one thing is made up of all other things. One thing contains the whole cosmos.
~Thich Nhat Hanh