As true Catholics, we don't accept relativism. We have the teaching authority of the Church to guide us. The Lord Himself solemnly declares: “And I tell you, you are Peter, and on this rock I will build my church, and the powers of death shall not prevail against it. I will give you the keys of the kingdom of heaven, and whatever you bound on earth shall be bound in heaven, and whatever you loose on earth shall be loosed in heaven” (Mt. 16:18-19). We believe the assurance of the Savior that He will never abandon His Church: “I will be with you always until the end of time” (Mt. 28:20). Thus, the Church cannot teach error because it has promise of the Lord that He will send the Spirit of Truth to guide it and to lead it into ALL the truth: “But the Advocate, the Holy Spirit whom the Father will send in my name, will teach you everything and remind you of all that I have said to you” (Jn. 14:26).
Unlike in Protestantism and Evangelicalism, there is no central teaching authority – everything is interpretation – hence, truth remains to be subjective and relative (and that is no truth at all). The Catholic Church, on the other hand, has a teaching authority as willed by its Divine Founder. Thus, when as doctrine is doubted or debated, the Church settles the issue once and for all. Truly, the Church is the “pillar and bulwark of the truth” (1 Tim. 3:15). When our leaders make a binding decision, we obey and submit them because it is written: “Obey your leaders and submit to them; for they are keeping watch over your souls, as men who will have to give account” (Heb. 13:17). - by Jason Noel