Colossians 4:3-4 Withal praying also for us, that God would open unto us a door of utterance, to speak the mystery of Christ, for which I am also in bonds: 4 That I may make it manifest, as I ought to speak.
Paul’s prayer
Paul asked the believers at Colossae to pray for him that God would open doors for him to give his testimony and share the gospel with many others. Paul knew from experience that it was the Lord Who opened doors for him (2 Cor 2:12). The purpose of an open door is to enable us to preach/testify of the gospel and to speak the mystery of God to those who do not know or have never heard. In the Revelation, John writes that it is the Lord who opens and closes doors (Rev 3:7). Paul indicates that door of opportunity are answers to prayer, not human devices.
Criteria for open doors
Jesus told the church of Philadelphia that there were three criteria that brought about the open door by the Lord (Rev 3:8).
1) Thou hast a little strength – it is not through our