Remember, the honest Protestant living in simple faith, one of good will, loves Christ with such a zeal and ferocious passion because he literally has nothing else but to throw Himself on Christ as best he can after he is Baptized; he is at an absolute poverty of history, ecclesiastical shepherding and guidance, Sacramental Grace, Saintly and Angelic Intercession, and so many other good and perfect Gifts from the Father of Lights, crowned most perfectly by the Holy Eucharist.
'To faint away with the desire to love this great God more and more is little.'- St. Paul of the Cross
and let me desire you by seeking you;
let me find you by loving you,
and love you in finding you.
that you have made me in your image,
so that I can remember you, think of you, and love you.
and darkened by the smoke of sin,
that it cannot do that for which it was made,
unless you renew and refashion it.- St. Anselm, Archbishop of Canterbury, Doctor of the Church
If you do this, if these are the songs of you heart, the cry of your lips; if the Holy Spirit flowing from Jesus Christ is your only thirst, I can promise you, you will lead many Protestants to the fulness of truth. Carmelite spirituality and writers can help foster this sort of Divine intimacy and love in the devout Catholic.
2) It is utterly easy to see fragmented bits of vanity that we call knowledge of God and grasp at them and clutch them to your chest, instead of following God's reach through these sacramental accidents to God Himself. It is far better to have Wisdom the Person, than to clutch at and hold fragmented bits of knowledge, themselves brought down from infinite and staggering heights to fit inside our mind. We clutch at these facts and mull them over in our minds like a child clutches a teddy bear at the doctors office, hoping that it will impart to him courage and strength, and that it will protect him, when there is a Person in the Room that is giving Him a shot to truly strengthening him. We are in the room of this world, and the True Physician, Christ Himself, is waiting to strengthen us with His own self, with the only Cure that will simultaneously purge all that is offensive and sinful within us, and strengthen us into partaking of the Divine Nature: His Sacred Blood. We must realize our weakness, the pitiable frailty of all our exalted knowledge, and realize that all of these separate ideas turn into dust in our clutching hands if we do not surrender first to Absolute Truth and Love Himself, and allow Him to assume us and our knowledge that we know with us into Himself, and so bring all into Absolute Unity and Absolute Truth. In eternity, there will not be answers, but The Answer; not truths, but The Truth; not lights to guide our journey here on earth, but earth shattering Light Himself. All questions and all answers will melt away before His Face, and God shall be all in all. Transcendence can never fit entirely inside of our minds, but must instead work on us from His own volition of Will. Let us surrender in meekness to that Will to transform us.