3:8
I have known thy works; behold! I have set before thee a door -- opened, and no one is able to shut it,
because thou hast a little power, and didst keep My word, and didst not deny My name;
http://www.kingdombiblestudies.org/Revelation/rev54.htm
THE CHURCH IN PHILADELPHIA Part 54-56
The second church, of course, against which the Lord laid no charge, nor did He tell them to repent, was the church in Philadelphia. Because they kept the word of His patience, by which the kingdom of God is inherited, He gave them wonderful promises. To the church in Philadelphia the Lord said, “
Hold that fast which thou hast, that no man take thy crown.” These last words mean “that no man step into that place which was designed for thee.” For example, after the manner that Jacob stepped into Esau’s place; Judah stepped into Reuben’s place; David stepped into Saul’s place; Matthias stepped into Judas Iscariot’s place; the church stepped into Israel’s place.
The message is clear — God
will have a victorious body, a company of overcoming sons of God, who shall within themselves overcome all things and be crowned with life, glory, authority, and power! Should we fail to move in and possess our inheritance in God, as the generation of Israelites who came out of Egypt did, the Lord will reach out and raise up others to take our place, and they will thus
take our crown!
The “crown” is mentioned in connection with only
two churches out of the seven: Smyrna and Philadelphia — God’s overcoming remnant!