1 Thessalonians 4:1

"Finally, brothers, we instructed you how to live in order to please God, as in fact you are living. Now we ask you and urge you in the Lord Jesus to do this more and more." NIV translation

Paul commends the people for living to please God and he urges them to do so more and more. He is encouraging them to grow to maturity in their faith as the more we grow in Christ the more we are able to please God.

1 Thessalonians 4:2

"For you know what instructions we gave you by authority of the Lord Jesus." NIV translation

The instructions that Paul gave will be covered in chapter five and they are commonly called the commandments for believers. We must remember that this is not for salvation but because we are saved and want to please God.

1 Thessalonians 4:3 - 5

"It is God's will that you should be sanctified: that you should avoid sexual immorality; that each of you should learn to control his own body in a way that is holy and honorable, not in passionate lust like the heathen, who do not know God;" NIV translation

We are called to be set apart for God's use (sanctified) and a part of that is being in control of our own bodies. In 1 Peter 1:2, we saw that this process of sanctification is a work of the Holy Spirit. Therefore, to control our bodies we can listen to the Spirit and God will help us to avoid the temptations of lust.