What is heaven?

The Bible speaks of four different heavens:

1. Where the birds fly (Jer. 15:3), the sky.  This will be destroyed at the Lord’s return (Matt. 24:35; 2 Pet. 3:10-11).
2. Where the planets and stars are (Is. 13:10), space.  This will also be destroyed at the Lord’s return (Matt. 24:35; 2 Pet. 3:10-11).
3. Paradise, the part of Hades where Jesus and the thief, Lazarus and Paul were (Lk. 16:23; 23:43; 2 Cor. 12:2-4; cf. Acts 14:19-20).  This will be cast into the lake of fire on Judgment Day (Rev. 20:13-14).
4. Where God dwells (Ps. 11:14).  This is where the saved will spend eternity after Judgment (Matt. 25:46; 1 Pet. 1:4; Rev. 21:1-3).