Revelation 3:8 - Matthew Poole's English Annotations on the Holy Bible

I know thy works: it is very probable, that our Lord, by these ministers works, understands the works proper to them in their function, their labour in preaching and propagating the gospel, which Christ did not only know and observe, but also approve of, and promiseth them a liberty to go on, and success in their labours, under the notion of an open door: see 1 Corinthians 16:9 2 Corinthians 2:12 Colossians 4:3. And no man can shut it; so as it should not be in the power of adversaries to hinder his success. For thou hast a little strength; both inward strength, and outward helps and advantages. And hast kept my word; the doctrine of faith is by thee kept pure, as also my precepts for a holy life. And hast not denied my name; and thou hast not been by any temptation prevailed upon to apostatize from the profession of the gospel.