Matthew 13:3-9 A sower went out to sow. And as he sowed, some seeds fell along the path, and the birds came and devoured them. Other seeds fell on rocky ground, where they did not have much soil, and immediately they sprang up, since they had no depth of soil, but when the sun rose they were scorched. And since they had no root, they withered away.
Other seeds fell among thorns, and the thorns grew up and choked them. Other seeds fell on good soil and produced grain, some a hundredfold, some sixty, some thirty. He who has ears, let him hear.
Not all seed falls on good soil.
That's the only reason the guy would have turned his back on a profession of faith in Christ. It never took to begin with.
Maybe it will "take" for him now.
Whatever it takes.
Save that nonsense for people who become Muslim, or Buddhist, or even for those "Presbyterians" who worship some entity they call "Sophia". Orthodox Catholics profess faith in Jesus Christ every bit as much as you do.
But, BTW, your whole "it never took" line of argument kind of drops "assurance of salvation" on its head. How can any Proddie really know that his "assured salvation" really "took"? Because he feels it really strongly? Maybe that's where the Mormons got their "burning in the bosom" idea?