Hi,
I am a Protestant but I have a deep respect for genuine Catholics.
I am interested in creating a discussion and obtaining full responses from Catholics under the theme:
‘What does it mean for a Catholic to live by faith?’
In other words, what is at the heart of a genuine Catholic spirituality? What practical things constitute living by faith for a Catholic? How does living by faith for a Catholic differ from living by faith for a Protestant?
I’m a former Protestant. My Protestant parents introduced me to the Lord, and I came to know Him personally at the age of 15. He gave me many wonderful spiritual experiences as a Protestant, and ended up leading me into Catholicism at the age of . . . last Pentecost, so 23.
I can tell you how living by faith in day to day life has changed for me, upon becoming Catholic.
While I was Protestant, this was my system of behavior when I wanted to know things from my dear Lord:
I would first pray and ask Him for his view. Then I would research what the Scripture has to say on the matter. Then I would come to an interpretation that appeared to me to make the most sense. I would ask the Spirit to direct me to God’s will on the matter, would often have a spiritual experience or moment of illumination, and then would feel I had Scripture, Reason and the confirmation of the Holy Ghost on the matter (our Counselor, as Christians), so for me the matter was settled.
I would pray to the Lord throughout day to day activity, receiving signs often or other words in answer to my prayers. I think God did greatly bless me.
The shift to Catholicism came after a spiritual dark spot in my life and, I believe, the Virgin Mary’s intercession. I described that side of the shift recently in the patron saints thread in this Spirituality forum.
The change for me was monumental. Like smacking your face in ice water.
I HAD THE EUCHARIST!

HALLELUJAH!!!
There is nothing in the entire world like the Catholic Eucharist. I had reverenced the Protestant Eucharist and had gone to different presentations of the Protestant Eucharist, from an Episcopal church to an Assemblies of God, but they are nothing in comparison.
Nothing. Like eating a peanut vs. eating a steak and mash potatoes. Sorry if you find that insulting at all

.
The Catholic Eucharist is at the heart of my faith life. It is the single most important feature of what makes me Christian. It is Life.
The kinds of spiritual experiences I’ve had surrounding that Eucharist blow me away.
Eating the Eucharist itself blows me away. Glory be to God. His glory consumes the Eucharist completely. It is the most exquisite delight anyone can partake of on Earth.
That’s the most dominant feature of what changed for me, the glory of the Eucharist sweeping up my earlier spiritual existence and filling it with overflowing new life.
The Eucharist is what matters most.
Aside from it- the other sacraments were big changes. The Catholic Confession, I found, is wildly powerful to knock out sins. It’s like a giant hammer. Wham. Sin gone. Lol.
Sins also can be relieved through personal praying to God, yet that is a less perfect way. In my experience when praying for forgiveness and removal of sin from my life as a Protestant, I would often feel some spiritual burden left over when I was done. It wasn’t 100% release, and the battle against spiritual evil within me that I fought afterward was sometimes very long and wearisome.
The Confessional is more powerful, and there are a lot of reasons for that. I won’t get into them all here, as that’s not the point of your question.
Then, living by faith also includes for me now hearing and feeling the guidance, protection and blessings of the Blessed Virgin Mary. Her intercession has made a very large difference in my life.
My practice with Sacred Scripture remains basically the same as it was when I was Protestant, on matters where the Church has not given an authoritative teaching. I feel that the Church’s authority saves me from a lot of subjectivity when it comes to really important matters, and the subjectivity is inherent in my former triad of ways of structuring my doctrinal beliefs: Reason (is a personal viewpoint, which others may disagree with, so it’s subjective) + Scripture (my interpretation of Scripture verses- others may disagree with it, so it’s subjective) + Spirit (If spiritual experiences aren’t required to conform with certain teachings authoritatively known to be true, but instead are paving the doctrinal ground for us themselves, we can’t know whether or not they’re misleading us).
This is why the Tradition and Magesterium of the Church are so important to me, filling out and finalizing what is doctrinally true on extremely important matters.
I reverence the Scripture and read it to know God’s will.
I still have many experiences with the Spirit of God. I still seek Him, as I did before, and find Him, and He answers my prayers.
I seek the Lord in faith.
Does this answer your question? I’m not completely sure what your question was after.
Jim gave a really good response:
JimR-OCDS:
For me, to live by faith means putting Jesus Christ first in everything. It means, loving, as loves. It means becoming more Christ-like.
I emphatically agree with him on this.