you were sealed with the Holy Spirit of promise, who is the guarantee of our inheritance until the redemption of the purchased possession, to the praise of His glory.--Ephesians 1:13b-14
The last part of verse 13 tells us that we were sealed with the Holy Spirit of promise at the time of our salvation. We who believe have been give the earnest of the Spirit of God in our hearts. At the moment of salvation every believer is given the Holy Spirit of God which secures and preserves His eternal salvation. The Spirit is the guarantee of our inheritance that is reserved in heaven for us. God's word to us should be enough but in His grace and mercy, He sealed us with His Spirit. It is a divine engagement ring...we are now the betrothed of Christ who will never be forsaken. The Spirit is our guarantee.
"You are not in the flesh but in the Spirit, if indeed the Spirit of God dwells in you, Now if anyone does not have the Spirit of Christ, he is not His. And if Christ is in you, the body is dead because of sin, but the Spirit is life because of righteousness. But if the Spirit of Him who raised Jesus from the dead dwells in you, He who raised Christ from the dead will also give life to your mortal bodies through His Spirit who dwells in you.--Romans 8:9-11
We as believers are temples of the Holy Spirit.
Or do you not know that your body is the temple of the Holy Spirit who is in you, whom you have from God, and you are not your own? For you were bought at a price; therefore glorify God in your body and in your spirit, which are God’s.--1 Corinthians 6:19-20
Those of us who believe now live and move and have our being in Him. We have died and our life is hidden with Christ in God. The Spirit of God is our Helper and our Advocate... He empowers us, encourages us and equips us for ministry. He is also, as Ephesians 1:14 tells us, the guarantee of our inheritance in Jesus Christ.
The Spirit Himself bears witness with our spirit that we are children of God, and if children, then heirs—heirs of God and joint heirs with Christ, if indeed we suffer with Him, that we may also be glorified together.--Romans 8:16-17
We are not our own....We are His purchased possession. We do not live to ourselves because we do not belong to ourselves. We belong to God so we live to Him. In His grace and mercy He chose to provide us fallen creatures made in His image with redemption. We are not saved and blessed in the heavenly places with all spiritual blessings for our glory but for God's. Isaiah 43:20-21 says this:
The beast of the field will honor Me,
The jackals and the ostriches,
Because I give waters in the wilderness
And rivers in the desert,
To give drink to My people, My chosen.
21 This people I have formed for Myself;
They shall declare My praise.
We are saved to to declare His praise....to serve Him and glorify Him. "My" accomplishments, "my" life are not for my glory...but for HIS because without Him I can do nothing. I am His clay...His pot! I am vessel for His use. I am the work of His hand...any power or glory in this earthen vessel is of Him not me. My God is the preeminent One! He created me...He is the potter...He does as He wills with me, the clay. I bear His image and am to proclaim and display His glory in my words, actions and life. This is why He redeemed me...that I should be to the praise of His glory.