A most common mistake made by protestants who do not understand Catholic teaching is the suggestion that the opposite of "faith alone" is "works alone," and that Catholics believe in "works alone." Not true.
The question is not faith or works, not at all. Salvation requires faith and works.
“The question is not faith or works, not at all. Salvation requires faith and works. “
The question is whether faith produces works acceptable to God, or if works done make us acceptable to God.
“Faith is a work of God in us, which changes us and brings us to birth anew from God (cf. John 1). It kills the old Adam, makes us completely different people in heart, mind, senses, and all our powers, and brings the Holy Spirit with it. What a living, creative, active powerful thing is faith! It is impossible that faith ever stop doing good. Faith doesn’t ask whether good works are to be done, but, before it is asked, it has done them. It is always active. Whoever doesn’t do such works is without faith; he gropes and searches about him for faith and good works but doesn’t know what faith or good works are. Even so, he chatters on with a great many words about faith and good works.
Faith is a living, unshakeable confidence in God’s grace; it is so certain, that someone would die a thousand times for it. This kind of trust in and knowledge of God’s grace makes a person joyful, confident, and happy with regard to God and all creatures. This is what the Holy Spirit does by faith. Through faith, a person will do good to everyone without coercion, willingly and happily; he will serve everyone, suffer everything for the love and praise of God, who has shown him such grace. It is as impossible to separate works from faith as burning and shining from fire.” — Martin Luther