If a bird, an airplane, a wisp of cloud, or any kind of object comes into view, ignore it and don't let it distract you. It clearly emphasizes nonduality, nondiscrimination, and no self. First, think of the outer skin of your entire body. The skin is matter and is therefore a form of energy. Then, think of your flesh.
Flesh is also matter and therefore also a form of energy.
When you first begin this practice, repeat this process several times. You will reach the conclusion that everything in your body, and your body as a whole, is energy and nothing else. Then, whatever you are sitting on is matter and thus energy. The air is energy. The warmth of the air is energy.