"I do not know how some people, who believe that a Christian can fall from grace, manage to be happy. It must be a very commendable thing in them to be able to get through a day without despair. If I did not believe the doctrine of the final perseverance of the saints, I think I should be of all men the most miserable, because I should lack any ground of comfort. I could not say, whatever state of heart I came into, that I should be like a well-spring of water, whose stream fails not; I should rather have to take the comparison of an intermittent spring, that might stop on a sudden, or a reservoir, which I had no reason to expect would always be full. I believe that the happiest of Christians and the truest of Christians are those who never dare to doubt God, but who take His Word simply as it stands, and believe it, and ask no questions, just feeling assured that if God has said it, it will be so. I bear my willing testimony that I have no reason, nor even the shadow of a reason, to doubt my Lord, and I challenge Heaven, and earth, and hell, to bring any proof that God is untrue."
C. H Spurgeon
Any doctrine that will twist and mold scripture to match their views isn't the Gospel