How much of the whole council does your way of thinking distort?
You refuse to give chapter and verse, and hide behind a veil of ambiguity.
Romans 11:22
Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.
Just like the children of Israel, if Christians do not continue in God's goodness (abide in Christ - read John 15) they too will be cut off
This is directly related to Gal 6:7,8 which tells us if we sow to the flesh (sin) we shall reap corruption (not longer in right standing)
This is WHY God put repentance in because if a person does not forsake and confess their sins, then they are still on the hook for their sins see: Proverbs 28:13 and 1 John 1:9.
God is not mocked, what we sow is what we reap. But some claim God can be mocked and we do not reap corruption if we sin and therefore they do not teach to open their eyes, and to turn them from darkness to light, and from the power of satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith (Acts 26:18)
What Jesus did on the Cross does not remove or do away with seedttime and harvest. Jesus said God's Kingdom is built upon sowing and reaping (Mark 4:26)
Romans 8:13
For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.
*Notice it's saying thru the Holy Spirit, so spare me the doing things in my own strength speech as that's not a credible argument. We can do all things through Christ Who strengthens us (Philippians 4:13)