Live as children of light

Ephesians 5:1-21
But among you there must not be even a hint of sexual immorality, or of any kind of impurity, or of greed, because these are improper for God’s holy people. Nor should there be obscenity(意淫), foolish talk or coarse joking, which are out of place, but rather thanksgiving. Such a person is an idolater—has not any inheritance in the kingdom of Christ and of God.
For you were once darkness, but now you are light in the Lord. Live as children of light  (for the fruit of the light consists in all goodness,righteousness and truth)  and find out what pleases the Lord.
Therefore do not be foolish, but understand what the Lord’s will is. Do not get drunk on wine, which leads to debauchery. Instead, be filled with the Spirit, speaking to one another with psalms, hymns, and songs from the Spirit.
Always giving thanks to God the Father for everything, in the name of our Lord Jesus Christ.
In a word, we are to copy God's own character, living lives of sacrificial love which will bear the searching light of God. Once we belonged to the dark: now we are 'children of light'.
Submit yourselves to one another, 'Paul says, speaking to all his readers, men and women alike.
Why?
We are the children of light do not doing the thing when we were in the darkness. Everything should giving thanks to God the Father, if we find it is not honor the Lord, it is the evil thing. Be wise and find out what pleases the Lord.
Imitate the Lord, for we are his sons, follow God's way and do the right things.
Let the Spirit fill us in stead of drunk. 
Forbid any sexual immorality,  impurity, greed, obscenity, foolish talk, coarse joking. 
How?
Great! I am son of light, giving thanks to the Lord! For God is holy, and righteousness.