Don't do it just now, but if you were to squat down and try to pick up something very heavy, like a boulder or a stone countertop, and exert yourself mightily, then turn your eyes upward, you might see a brightness emanating from above and behind, the source of which is beyond your view.

If you practice this, straining and training your eyes and muscles, you can see further and further toward that source, and eventually, you can focus on it. Hold it in your view. This is the Second Sun. Remember this.