Charles Ellicott Commentary Isaiah 48:17

"Thus saith Jehovah, thy Redeemer, the Holy One of Israel: I am Jehovah thy God, who teacheth thee to profit, who leadeth thee by the way that thou shouldest go." — Isaiah 48:17 (ASV)

The Lord your God who teaches you to profit. —These words apply to the natural human desire, and perhaps we may add, to the specially national desire, to make a good investment. The question, 'What was profitable?' was one to which people returned very different answers. It was the work of the true Redeemer to lead people to the one true imperishable gain , to lead them in the one right way (John 14:4–6).