The poster comments on the subject (racism) in a non-direct way, trying to invoke the reader visually into the inevitable conclusion. It has multiple reads, that provoke critical thinking and raise awareness on the subject and its results globally.
Trying to fill in someone else's shoes is futile. The person will at best be a shadow of the one who shoes they are trying to fill. It is best to have new shoes (their own) rather than live in the shadow of another
Raindrops travelling down a window whilst you're sitting inside in the warmth, perfectly dry. Watching the world go by, in the rain. City lights sparkling against all the raindrops that trickle down the windowpane.