Themes
You may have tangible wealth untold; Caskets of jewels and coffers of gold. Richer than I you can never be — I had a Mother who read to me.
— Strickland Gillilan

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Material riches are set against a childhood experience the speaker considers beyond price. The closing line reveals that the greater wealth is having been read to by a mother. Its simplicity gives a personal memory more value than the extravagant possessions listed before it.
Context reviewed