Paul, on the other hand was trained up by that same Jesus when he said this:
It is at the canter of what he shared about our relationship in and of Christ. Romans 6 says, Shall we continue in sin that grace abounds? No in no way, know you not that as many of us who were baptized were baptized into His death?
Galatians 3 states, we who have been baptized have put on Christ.
Your example from his letter to the Corinthians is not all inclusive.
Far too many people fail to keep this in mind when thinking back upon the many, many things Jesus instructed Israel, much of which doesn't apply to us today except in the minds of those sold out to replacement theology:
2 Corinthians 5:16
Wherefore henceforth know we no man after the flesh: yea, though we have known Christ after the flesh, yet now henceforth know we him no more.
This is overlooked and even explained away by most of the hirelings standing behind pulpits by way of them casting it into the shadows of obscurity for meaning in relation to the Lord's ministry and commands to Israel under the Kingdom Gospel. Replacement theology hounds continue to claim that ALL teaching and commands Jesus gave to Israel are binding upon us today. I've already shown in a previous post how that simply is impossible, but they continue to rattle their cups against the bars of their cells...
MM
CONTEXT, if we are all dead we are not in the flesh but in the Spirit. And we now have the capability to know all men through the Spirit, including our Lord and Savior the Christ.
We are a new creature born of the Spirit, behold all is new and of God through Christ. Born of the Spirit and not of the flesh.
In this new life we have been recounciled to God who through Christ and it is He that works in us both to will and do His good pleasure.
He in us, us in Him that the world might believe this ministry of reconciliation that He has given us.
For He made Him to be sin for us that we be made the righteousness of God IN Him.
For we are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people. I will give them a NEW Spirit and cause them to walk in my ways. For God has said A new Covenant I will make with the house of Israel, the stranger who is within their gate and those WHOM ARE NOT with them. For I will put my Law, my Word in their hearts that they do it. That is the word of faith in which we preach.
2Cor 5:14 For the love of Christ constraineth us; because we thus judge, that if one died for all, then were all dead:
2Cor 5:15 And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.
2Cor 5:16 Wherefore henceforth know we no man after the flesh: yea, though we have known Christ after the flesh, yet now henceforth know we him no more.
2Cor 5:17 Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.
2Cor 5:18 And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation;
2Cor 5:19 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.
2Cor 5:20 Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.
2Cor 5:21 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.