“But true wisdom knows when further fighting is pointless. I have Teod, and Arelon will soon be mine as well. Do not be like the stonelark, ever trying to dig a pit in the sand’s wet beaches and ever having your work destroyed by the tide. Embrace Shu-Dereth, and let your efforts become more than vanity.”
The Stonelark is a bird on Sel.[1]
They dig holes in wet sand, only to see them be filled in by the tide. Hrathen mentioned them during an argument with Sarene.