However one chooses to interpret Revelation 3:20, it must not be thought that the sinner possesses the power to open his own heart to Christ. Only God can do this (John 6:44; Acts 16:14; James 1:18). Although God’s sovereignty in salvation does not negate our responsibility to proclaim the Gospel to all men, we must never suggest to people that the power to convert their hearts lies within them (Psalm 110:3; Philippians 1:29; 2 Timothy 2:24-26) (Darryl Erkel).