3 Bible Verses about Open Doors

And to the angel of the church in Philadelphia write, These things saith the Holy One, he that is true, who hath the key of David, who openeth, and none shutteth, and shutteth, and no man openeth. I know thy works: behold, I have set before thee an open door, and no man can shut it; because thou hast but little strength, yet hast thou kept my word, and hast not denied my name.

for there is opened to me a great door, and effectual, and there are many adversaries.

But when I came to Troas to preach the Gospel of Christ, though a door was opened unto me by the Lord,