What’s the difference between faith and belief? How is one able to increase faith without increasing knowledge on a particular subject?
The Hebrew word
aman is translated as “believe”, “trust”, “have faith”, and also “support”, “nourish”, and “make lasting”. A derivative word is
omenat, meaning “pillars” or “supports of the door” as in 2 Kings 18:16. Another cognate is
emunah, which is “faithfulness” or “trust”, as in Exodus 17:12 where God brought victory to Israel as long as Moses would hold his hands up. Aaron and Hur held up his hands so that they “remained
emunah until sundown”. All of these illustrate that faith is an action that we take, which is exactly what the Catholic church teaches. Faith is a work, it’s about what you DO and not merely about what you believe.
The Catechism of the Catholic Church expresses this by saying that faith is an act of the will in which one turns toward God and away from sin; in which we decide that we will cooperate, with our intellect and will, with the divine grace that God gives us to enable us to comply with the moral law; it is a free response of the human person to the initiative of God; it is a personal adherence of the whole man to the God who reveals himself. It is the theological virtue by which we believe in God and believe all that he has said and revealed to us, and that Holy Church proposes for our belief, because he is truth itself. By faith “man freely commits his entire self to God.” For this reason the believer seeks to know and do God’s will. “The righteous shall live by faith.” Living faith “work
through charity.”
These are all actions, things we do in obedience to God. Thus the Apostle Paul says in Romans 1:5 "Through Him we have received the grace of apostleship, to bring about the obedience of faith…” This obedience is the essence of Christianity: submission to the Eternal One who was enfleshed, and through that submission being brought into union with Him so that we may participate in His divine life.