Bentley was well liked by his parishioners because of his philosophy of emphasizing good works over rigid doctrine. He himself lived modestly, and was a boarder at the Crowninshield-Bentley House from 1791 until his death in 1819. He gave almost half his salary to help the poorer members of his congregation. He often shared the East Church pulpit with pastors of other sects. He was a strong supporter of public education and frequent tutor and substitute teacher; among the students he taught was Nathaniel Bowditch. The Bentley School in Salem is named for him.