10Put on your new nature, and be renewed as you learn to know your Creator and become like him. 11In this new life, it doesn’t matter if you are a Jew or a Gentile, circumcised or uncircumcised, barbaric, uncivilized, slave, or free. Christ is all that matters, and he lives in all of us. 12Since God chose you to be the holy people he loves, you must clothe yourselves with tenderhearted mercy, kindness, humility, gentleness, and patience. 13Make allowance for each other’s faults, and forgive anyone who offends you. Remember, the Lord forgave you, so you must forgive others. 14Above all, clothe yourselves with love, which binds us all together in perfect harmony.
Before verse 10, we may be thinking that how are we going to do all these? How are we going to be conscious of heaven and put to death our old nature? Verse 10 answers it so well.
As you learn to know your Creator more and learn to be like him, you will begin to put on your new nature and then put off your old one and then yearn for heaven. There is no spiritual growth without a growing revelation of God; you can’t pray it or fast into it, you need to do the work of studying and meditating on God and his word.
Verse 11 shows the free state that is in. Christianity is not the religion of men or of Americas or of the rich, we are equal in the eyes of God. Christ lives in all of us.
The great thing that constitutes the peculiarity of the church is, that Christ is its Saviour, and that all are his friends and followers. Its members lay aside all other distinctions, and are known only as his friends. They are not known as Jews and Gentiles; as of this nation or that; as slaves or freemen; but they are known as Christians--distinguished from all the rest of mankind as the united friends of the Redeemer - Albert Barnes NT Commentary
In Verse 12, we are told the things that must replace the things we had taken off from the old nature - mercy, gentleness etc. Which of these are you lacking? I know mine is patience.
Lastly, i want to touch on Verse 13 where Paul says to make allowance for each other's faults. This means to me that i shouldn’t be easily tripped off by other people. I should give room for people to make mistakes without holding against them. I should forgive freely and give people room to repent and come back to me. Im i too rigid? Am i scary to approach? Do i give people (not your wrong ex-boyfriend o) 2nd chances?
To love God with all the heart, soul, mind, and strength, and one's neighbour as one's self, is the perfection which the new covenant requires, and which the grace and Spirit of Christ work in every sincerely obedient, humble believer; and that very love, which is the fulfilling of the law and the perfection itself which the Gospel requires, is also the bond of that perfection. It is by love to God and man that love is to be preserved. Love begets love; and the more a man loves God and his neighbour, the more he is enabled to do so. Love, while properly exercised, is ever increasing and reproducing itself. - Adam Clarke’s Commentary