Yes, today we remember that we are dust. But also: Remember you belong to God, and to God you shall return.
Lent is simple, deceptively simple. Lent is about accepting our limits. Lent is about giving up what makes us sad. Faith is about falling in love, and following Jesus.
I always get a lot of hits around the start of Lent. My guess is that stuck pastors Google "Ash Wednesday Sermon" and my posts come up, but I thought I'd share some old reflections: https://christiandifferent.wordpress.com/category/ash-wednesday/