Charles Ellicott Commentary Proverbs 10:15

"The rich man`s wealth is his strong city: The destruction of the poor is their poverty." — Proverbs 10:15 (ASV)

The rich man’s wealth is his strong city — i.e., an actual protection to him against his enemies, for by it he can get aid; or it gives him the consciousness of power, courage: whereas poverty drags a man down, and prevents his advance in life, or makes him timid, and unable to defend himself.