Alternatively, I can become aware of my feet on the ground or my behind on the chair. In this way I give myself into Form, sink into Form, become absorbed into Form. Sensations are pleasant, unpleasant or neutral. This is the subjective experience of them. In terms of our behaviour it is movement towards, away from or neither towards nor away from something.
Sensation acts as a motivating force on the instinctual level.
It moves us away from danger or an undesirable situation, and towards things that are conducive to our well-being, rather like a cat moves from a cold spot to a warmer place. But if the warm place becomes too hot, vedana will arise and the cat will move to a cooler spot. Plants too move according to vedana, moving their leaves and flowers towards the sun and their roots towards water. Their shoots grow upward and their roots downward. We humans experience vedana in the same way.