The Catholic Church affirms predestination as a DE FIDE Dogma (the highest level of binding theological certainty).
THE CATHOLIC DOGMA. – The predestination of the elect.
Consequently, the whole future membership of heaven, down to its minutest details, has
been IRREVOCABLY FIXED FROM ALL ETERNITY. Nor could it be otherwise. For if it
were possible that a predestined individual should after all be CAST INTO HELL or that
one not predestined should in the end REACH HEAVEN, then God would have been
MISTAKEN in his foreknowledge of future events; He would NO LONGER be omniscient.
(2) The second quality of predestination, the DEFINITENESS of the number of the elect,
follows NATURALLY from the first. For if the eternal counsel of God regarding the
predestined is UNCHANGEABLE, then the number of the predestined must likewise be
UNCHANGEABLE and DEFINITE, subject NEITHER to ADDITIONS nor to
CANCELLATIONS. Anything indefinite in the number would eo ipso imply a lack of
certitude in God’s knowledge and would DESTROY His omniscience. End quote.
THE THEORY OF PREDESTINATION prævisa merita
THIS THEORY, CHAMPIONED BY all Thomists and a few Molinists (as Bellarmine, Francisco Suárez, Francis de Lugo):
Asserts that God, by an absolute decree and without regard to any future supernatural merits, predestined from all eternity certain men to the glory of heaven, and then, in consequence of this decree, decided to give them all the graces necessary for its accomplishment. End quote.
So, Steve please look up to the above DE FIDE Dogma and please tell us: Who can lose his/her salvation by not persevere till the end???
All WILL BE SAVED is NOT a heresy, it is the Eternal Design/Plan and the Eternal WILL OF GOD!!! – 1 Tim.2:4; 2 Pet.3:8-9; Rom.5:18; 1 Cor.15:22; Eph.1:9-11; Col.1:20; Ez.36:25-28; Jonah 4:11 (the way God saved EVERYONE in Nineveh, the same way God will save everyone in the whole world for HIS GLORY and because of His Love and Justice); CCC 677 (the Bride of Christ will come down from heaven with Christ to rule over the Nations, if the Nations in hell; Will they rule over the Nations in hell???); Dan.7:13-27; etc.