Calvinist. It is not possible for the elect to discard Christ.
Well that begs the question, how do you know you are elect?
2Peter1 tells us
Through these, he has bestowed on us the precious and very great promises, so that through them you may come to share in the divine nature, after escaping from the corruption that is in the world because of evil desire. For this very reason, make every effort to supplement your faith with virtue, virtue with knowledge,
knowledge with self-control, self-control with endurance, endurance with devotion,
devotion with mutual affection, mutual affection with love.
If these are yours and increase in abundance, they will keep you from being idle or unfruitful in the knowledge of our Lord Jesus Christ.
Anyone who lacks them is blind and shortsighted, forgetful of the cleansing of his past sins. Therefore, brothers, be all the more eager to make your call and election firm, for, in doing so, you will never stumble.
For, in this way, entry into the eternal kingdom of our Lord and savior Jesus Christ will be richly provided for you.
It says that faith must be supplemented with Virtue, virtue with knowledge, self control and endurance, devotion and love. The elect are those that DO the will of the Father, just as Jesus says. Not everyone that says to me Lord, Lord, will enter the kingdom of heaven, but those that DO the will of the Father.
While it may not be possible for the elect to discard Christ, it is possible to a human being to grow weary and give up trying to be a Christian and therefore return to sin.
Being one of the elect is a way of life, not a one and done legal transaction that says no matter what one does, he cannot be lost.
The Christian way of life is a constant battle against the forces of darkness. Those that do not fight this battle will be overcome and lost. The parable of the seed and the sower explains this.
As Catholics, we know we are the seed in the good soil if we avail ourselves of the sacraments, and we lead a contemplative life. Praying the Rosary is an exceptionally good way to contemplate the scriptures as it reviews 20 mysteries of Christ's life and ministry, all taken directly from the Gospels.
It allows us to keep Christ ever before us, and it is very hard to fall into sin, if Christ is directly beside us or in our hearts.
We need to cultivate virtue and be made worthy of the promises of Christ