'In Christ' in the Bible
It is a reason for pride and exultation to which our conscience testifies that we have conducted ourselves in the world [generally] and especially toward you, with devout and pure motives and godly sincerity, not in fleshly wisdom but by the grace of God (the unmerited favor and merciful kindness by which God, exerting His holy influence upon souls, turns them to Christ, and keeps, strengthens, and increases them in Christian virtues).
For [no matter] how many promises God has made, in Christ [the answer] is "yes" [i.e., Christ has fulfilled all of God's promises to mankind]. Also, through Christ, the "amen" [Note: This word is always translated elsewhere as "May it be so"] can be said by us in order to honor God.
Now he which stablisheth us with you in Christ, and hath anointed us, is God;
Now thanks be unto God, which always causeth us to triumph in Christ, and maketh manifest the savour of his knowledge by us in every place.
For we are not as many, which corrupt the word of God: but as of sincerity, but as of God, in the sight of God speak we in Christ.
But their minds were blinded: for until this day remaineth the same vail untaken away in the reading of the old testament; which vail is done away in Christ.
Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.
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.
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.
But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ.
I knew a man in Christ above fourteen years ago, (whether in the body, I cannot tell; or whether out of the body, I cannot tell: God knoweth;) such an one caught up to the third heaven.
Again, think ye that we excuse ourselves unto you? we speak before God in Christ: but we do all things, dearly beloved, for your edifying.