Undulations are flow of changes to the awareness that are essentially interpreted as life, just like the way we interpret ECG graph.
When we hear music what we look for is the undulations in the sound. When we trek we enjoy the ups and downs of the mountains. Does it end there? When we eat we look for textural variations as well as a wide rage of sweet and sour variations. We just cant eat only the cream, we look for spongy cake and the crunchy nuts in between.
We enjoy these variations fairly delightfully and willingly.
Trouble is when we navigate our emotional landscape.