While walking I looked ahead and saw my shadow and thought of this quote: "We are but dust and shadow” by Horace, The Odes of Horace. 

Walking is a good time to ponder, so I suppose it is no surprise that some thoughts occurred to me.

My first thought was, that I have evolved in my appearance. Evolved is a kind word isn't it? In years past I seldom wore a hat, unless it was early in the morning and I was running.

I am, of course, my shadow so now even, even out for a casual walk, I am a guy with a hat, sometimes.

I also think that the quote above may have it not quite right. Rather than just dust and shadow, we likely are spirit, dust and shadow. 

All our thoughts, even deep ones, like these, reside somewhere, and that place of residence is likely in our  own spirits.