God, (who is rich in mercy,) for his exceeding charity wherewith he loved us, Even when we were dead in sins, hath quickened us together in Christ, (by whose grace you are saved,) And hath raised us up together, and hath made us sit together in the heavenly places, through Christ Jesus. That he might shew in the ages to come the abundant riches of his grace, in his bounty towards us in Christ Jesus. For by grace you are saved through faith, and that not of yourselves, for it is the gift of God; Not of works, that no man may glory. For we are his workmanship, created in Christ Jesus in good works, which God hath prepared that we should walk in them. (Eph. 2:4-10)
Welcome to Christianity in that case.
However, for catholicism it's this.
•" . . . the Second Vatican Council confirms: 'The bishops, successors of the apostles, receive from the Lord . . . the mission of teaching all peoples, and of preaching the Gospel to every creature, so that all men may attain salvation through faith, Baptism and the observance of the Commandments,'" (CCC 2068).
•"If any one saith, that by faith alone the impious is justified; in such wise as to mean, that nothing else is required to co-operate in order to the obtaining the grace of Justification, and that it is not in any way necessary, that he be prepared and disposed by the movement of his own will; let him be anathema," (Council of Trent, Canons on Justification, Canon 9).
We are saved by grace alone but not by faith alone. Grace gives us both faith and ability to persevere in good works.
Interesting how often people spend such energy arguing against Catholicism yet would not take time to learn a little bit about it.