A shadow is there, but in another sense it isn’t there at all. It has a shape and a tonal intensity – yet it’s as formless as a thought. You can’t touch it, smell it, taste it, hear it. If the sun goes behind the cloud, it vanishes.
It’s visible … and it’s empty. It’s here … and it’s gone. It is … and it isn’t.
The mystic Sufi poet Rumi wrote, “Like a shadow, I am and I am not.”
There’s so much to learn from contemplating shadows.