Here’s the main point — Catholics believe Christ died knowing that his death wouldn’t “cover” all believers. Hence the verse about how many will say “Lord, Lord,” and be surprised when they’re denied heaven. Many believe that the cup Christ begged to be delivered from before his death was not the Crucifixion but the fact that not all sinners would be saved by his death. (That last part is not Catholic dogma, just something written by a Catholic) We could argue about what being “in Christ Jesus” means but we would never agree.
Here’s the main point — Catholics believe Christ died knowing that his death wouldn’t “cover” all believers.
John 6:37 "All that the Father gives Me will come to Me, and the one who comes to Me I will certainly not cast out. 38 "For I have come down from heaven, not to do My own will, but the will of Him who sent Me. 39 "This is the will of Him who sent Me, that of all that He has given Me I lose nothing, but raise it up on the last day. 40"For this is the will of My Father, that everyone who beholds the Son and believes in Him will have eternal life, and I Myself will raise him up on the last day."
The scripture clearly states that ALL those drawn by the father will become believers and Christ will lose none.
Hence the verse about how many will say “Lord, Lord,” and be surprised when they’re denied heaven. Many believe that the cup Christ begged to be delivered from before his death was not the Crucifixion but the fact that not all sinners would be saved by his death. (That last part is not Catholic dogma, just something written by a Catholic)
Matt 7:21" Not everyone who says to Me, 'Lord, Lord,' will enter the kingdom of heaven, but he who does the will of My Father who is in heaven will enter. 22"Many will say to Me on that day, 'Lord, Lord, did we not prophesy in Your name, and in Your name cast out demons, and in Your name perform many miracles?' 23"And then I will declare to them, 'I never knew you; DEPART FROM ME, YOU WHO PRACTICE LAWLESSNESS.'
Those rejected were NEVER known by Christ, were never real Christians. They were tares posing as believers, most likely self deluded into thinking rituals and forms of Godliness was a means to Heaven and did not have a saving Faith (trust in Christ's work and substitutionary atonement alone).