2 Corinthians 5

1 This verse may refer to our bodies or to our earthly homes. We can take comfort in knowing that even though our bodies will die or that our homes may be taken away from us, God will one day provide us with bodies that can not die and homes that will never be taken away.
2 We can enjoy life here, but we eagerly long for the day when we can enjoy life unhindered by sin. Our eternal home with God will not be tainted with sin.
4 A Christian can be confident that after death he will be raised to life again. However, it is still common for one to be apprehensive about death. At least part of this fear is due to the "unnatural" state of death. God created us to live forever, but sin introduced the degradation and eventual death of our bodies.

When a body dies, the person's spirit remains and "sleeps" until Judgement Day. On that Day, the spirit will receive a new and eternal body. So when we groan in this lifetime it is not simply because we want to get rid of the sinful body, nor do we want to remain as a detached spirit. We long to have our eternal bodies where we will no longer have to fear a day when we would be forced to "move out" of it.

5 Part of the work of the Holy Spirit is to teach and comfort our spirits in this lifetime. The indwelling of the Holy Spirit is God's "down payment" on His promise to raise us to eternal life again after our bodies have died.
6 Our eternal life will be lived in the unmistakable presence of God. God surrounds us here on earth, but our bodies are separated from Him by the sin that is inherent in our bodies. This is one reason why these bodies must die and we must be given new bodies to dwell in His presence. In the meantime, we are to live our lives in these bodies however God designates so that we can share in His ministry of salvation to those who do not yet know Him. One way God communicates with us is through the indwelling of His Holy Spirit within us.
7 The spiritual aspects of our lives and this world are not things that can be seen, touched, or scientifically tested. This causes great frustration for most people because it is difficult to accept such abstract things as real. The spiritual world is also difficult for us to interpret, which has lead to much confusion and conflicting opinions in spiritual matters. However, God has explicitly told us about many aspects of the spiritual world through the creation, written word, prophets, miracles, and the work of Jesus. Even so, these things are not accepted as definitive proof by the materialistic worldview. Thus, the Christian must live in faith that what God has revealed to us is indeed true. Our feelings and opinions can be flawed and we can be mislead by the material things that we consider real, but we can be confident that what God says is the ultimate Truth and will never fail.
10 We long to be with God and have that perfect love relationship with Him. Yet, in the meantime we must remember that we are accountable to Him in how we live our lives. There are consequences for ungodly behavior, even for Christians who have eternal security in their salvation. We must therefore strive to please God in all things at all times.
11 The "fear of the Lord" mentioned here refers to awe and respect, not fright. One motivating factor for sharing the Good News is our recognition of God as the rightful ruler of the universe.
12 Church leaders should not boast about themselves, but their teaching and behavior should be so excellent that the rest of the congregation can be proud of them. Praise from others should not be a motivating factor for those who preach the Good News, but the heartfelt love for others should be.
13 Some people claimed that Paul was insane (e.g., Acts 26:24). Today, people often call committed Christians "religious fanatics." If insanity is the only explanation for Christianity, then our only defense is that we are "crazy for God." However, if one can consider a Christian rational, then he could see that our motivation is the spiritual benefit of others.
14 People are often do a variety of things that please those who love them. How much more should we seek to please Jesus who loves us perfectly and demonstrated His love by suffering the punishment for our sins in our place.
16 We can not judge people based on worldly standards. Attributes like gender, nationality, social status, and skin color make no difference in God's eternal perspective. We know Jesus was a poor Jewish male when He was here in the flesh, but now He is the only source of salvation for all people in all places for all time. God has graciously allowed salvation to be obtained by all kinds of people. As Christians, we are to continue the work that Jesus began.
17 When a person becomes a Christian, he does not change physically. A new spirit is "born" within him (the "second birth," John 3:3-7). The world will not see a physical change, but from God's eternal perspective, the new Christian is brand new.
18 Since God created all things, they belong to Him. However, sin separated the creation from God. Through Jesus, God can bridge the gap that sin caused. The continuing work of the Church is to continue this reconciliation process. If a person is not reconciled to God before his death, he will be forever separated from Him.
19 It is unfortunate that many churches seem to distance themselves from this sinful world. One of the primary functions of the Church (if it is not the primary function) is to continue Jesus' ministry of reconciliation. Our desire should be that as many people as possible can respond to a correct teaching and example of the Good News of salvation.
20 Christians are given full authority by God to tell others how they can be reconciled to God. This does not mean that a Christian must memorize the entire Bible or understand every aspect of salvation. A Christian should first understand that what has happened to him is real and be able to explain how God's love has changed him and can change others too.
21 Jesus lived perfectly in the flesh and never sinned, yet He took the punishment for sin in our place. Our faith in His work allows God to accept Jesus' punishment on our behalf and for Jesus' righteousness to be attributed to us. In a legal aspect this would be similar to a high official paying a fine, pardoning us, or accept responsibility for a problem on our behalf.