In 2 Corinthians 5, Paul continues to tell the Corinthians why he presses on in gospel ministry despite his groaning because of the sinful world pushing in on him. From a thoroughly gospel-centered perspective, he tells them that he continues on because of the hope that awaits after death. Referring to the body as a tent, he looks to his heavenly home where he expects to receive a building from God, a home free from the burdens and vulnerabilities of this world, a home where mortality is swallowed up by eternal life. His hopeful expectation is one reason he continues to press on.
As Christians, we should have the same hope, and it should cause us to press on in ministry just as it did Paul. But how can we be sure that we have a heavenly home awaiting us? There are several reasons. I'll offer two and expand on the second more thoroughly.
(1) We can be sure we have a heavenly home because the all-sovereign promising keeping God has "prepared us for this very thing" (2 Cor 5:5a). Having prepared us for it, we can be sure God will bring us to our heavenly home. God's track record is flawless, and His ability to accomplish His purposes is unquestionable.
(2) We can also be sure we have a heavenly home awaiting us because God "has given us the Spirit as a guarantee" (2 Cor 5:5b).
The second idea – God has given us the Spirit as a guarantee – raises an interesting and important question, how do we know if we have the Spirit?
How do we know if we have the Spirit?
When you look through Scripture, you find several tests that can be administered to discover if you have the Spirit or not, and, therefore, assurance of eternal life.
(1) Do you believe God is your Father?
"For you did not receive the spirit of slavery to fall back into fear, but you have received the Spirit of adoption as sons, by whom we cry, “Abba! Father!” The Spirit himself bears witness with our spirit that we are children of God,” (Ro 8:15–16)
(2) Do you look forward to your redemption and the return of Christ?
"And not only the creation, but we ourselves, who have the firstfruits of the Spirit, groan inwardly as we wait eagerly for adoption as sons, the redemption of our bodies.” (Ro 8:23)
(3) Do you accept, believe and understand the things of God, which are written in His Word?
"Now we have received not the spirit of the world, but the Spirit who is from God, that we might understand the things freely given us by God. And we impart this in words not taught by human wisdom but taught by the Spirit, interpreting spiritual truths to those who are spiritual. The natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned.” (1 Co 2:12–14)
(4) Do you confess that Jesus is not only your Savior but also the Lord of your life?
"Therefore I want you to understand that no one speaking in the Spirit of God ever says “Jesus is accursed!” and no one can say “Jesus is Lord” except in the Holy Spirit.” (1 Co 12:3)
(5) Do you seek to live in unity with other Christians?
"For in one Spirit we were all baptized into one body—Jews or Greeks, slaves or free—and all were made to drink of one Spirit.” (1 Co 12:13)
(6) Do you fight against what the sinful nature wants?
"But I say, walk by the Spirit, and you will not gratify the desires of the flesh. For the desires of the flesh are against the Spirit, and the desires of the Spirit are against the flesh, for these are opposed to each other, to keep you from doing the things you want to do. But if you are led by the Spirit, you are not under the law. Now the works of the flesh are evident: sexual immorality, impurity, sensuality, idolatry, sorcery, enmity, strife, jealousy, fits of anger, rivalries, dissensions, divisions, envy, drunkenness, orgies, and things like these. I warn you, as I warned you before, that those who do such things will not inherit the kingdom of God...And those who belong to Christ Jesus have crucified the flesh with its passions and desires." (Ga 5:16-21; 24)
(7) Are you growing in the fruit of the Spirit?
"But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such things there is no law... If we live by the Spirit, let us also keep in step with the Spirit.” (Ga 5:22-23; 25)
Your answers to the above questions will reveal whether you have the Spirit or not.
The Scriptures regarding the Holy Spirit are informed by leader questions over 2 Corinthians 5 in 2 Corinthians 1-7: True Discipleship by James Hughes