This life is temporary. It didn't come here to stay but is merely passing through.
2 Corinthians 5:1 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.
"We know" that Christ is alive, therefore, we know that death cannot claim us. Because I live, ye shall live also (John 14:19).
This body is only the house we live in. When a believer dies, the body goes to the grave, but the spirit goes to be with Christ.
When Jesus returns for His own, He will raise the dead bodies in glory, and the body and spirit shall be joined together for a glorious eternity in heaven.
The glorified body is called "a building of God, a house not made with hands"--our house which is in heaven. My glorified body will be like that of my Lord and Savior--perfect.