Greetings to the great parishioners of Steemchurch, to our able and capable leader @Sirknight, and to our hardworking Apostles - 
Meanwhile, I'll be talking about the place of the New creation and the need to renew ourselves in the knowledge of God will.
PUT ON THE NEW MAN
Paul wrote to the Colossians, admonishing them on the need to be put on the New man. That is, the old man and the old deeds must be put away.
"But now ye also put off all these; anger, wrath, malice, blasphemy, filthy communication out of your mouth. Lie not one to another, seeing that ye have put off the old man with his deeds; And have put on the new man, which is renewed in knowledge after the image of him that created him... but Christ is all, and in all" Colossians 3:8-11
The Scripture went further to say that if we are risen with Christ, we must seek those things which are above where Christ sits at the right hand of God. The New life demands that we set our eyes on things that are above and our affection shouldn't be on things on the earth.
Colossians 3:3 For ye are dead, and your life is hid with Christ in God.
This kind of death is one which is described by being "dead to sin". And since we've risen with Him, we are alive with Him in righteousness.
The fruits of the flesh are malice, anger, wrath, filthy communication, envy etc the describes the deeds of the old man. But the deed of the New man is that of God, for the fruits of the Spirit are joy, peace, gentleness, meekness etc.
WE ARE NEW CREATURES IN CHRIST
The book of Corinthians explains in a clearer way what being a New creature entails. How God in His love has brought us in this Fullness of life through His blood that we may be made righteous.
Therefore if any man be in Christ, he is a new creature, old things are passed away; behold, all things are become new. And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation. To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation. For He hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in Him (2 Corinthians 5:17-21)
Therefore, since He has died for us, we must live like those whom He sacrificed His life for. Consumed by His love, we must learn to be obedient to His voice and consolidate to His Word. That is, we should live not unto ourselves, but unto Him which died for us, and rose again. For now we have been brought into light (unlike when we were lost in the world; in darkness).
AS NEW CREATIONS
Hence, as new creatures, our perception of things changes; the way we interpret things changes; the way we speak too changes because the eyes of our understanding has been enlightened. We no longer talk like the world because we are not of the world, rather we do things like God who is our Father.
We act the same way He acts; we speak the way He speaks; we feel the same way He feels. As people of light, everything about us becomes different. Our speech becomes seasoned with grace. Our mind is renewed by His Word. Our path is that of light. And the eyes of our understanding becomes enlightened. For these are elements of the new creation.
In summary, if we live in the Spirit, let us also walk in the Spirit, being rooted and grounded in Christ, for in this, we radiate the glory of the new creation as children of God.