So also is the resurrection of the dead. There is a natural body, and there is a spiritual body. A seed goes INTO the ground in one form. It comes OUT of the ground in another form. This principle is true in water baptism.
Water baptism is a burial.
That is only way we can go to heaven when we die without having our resurrected material body. Otherwise we would be disembodied spirits and could not wear the white robes of Revelation 6. For we know that if our earthly house of this tabernacle were dissolved, we have a building of God, an house not made with hands, eternal in the heavens. In the end, at the last trumpet, the physical bodies of all the dead in Christ will rise from the grave, and we which are alive and remain will be caught up in the air to meet the Lord at His coming. The physical body will be changed in a moment, in a twinkling of an eye.