I’m glad you brought this topic up. I’ve been wrestling with that question “what is the faith?” and what I thought about Lee’s definition of it in the book discussed here. So, before my thoughts I’ve put links to the only verses in the New Testament that actually use those two words (based on look into Greek Interlinear, not Just English versions that sometimes add or delete “the” to faith.
Jude 1:3
https://biblehub.com/jude/1-3.htm
Colossians 1:4-8
https://biblehub.com/bsb/colossians/1.htm
Acts 3:16
https://biblehub.com/bsb/acts/3.htm
1 Timothy 1:19
https://biblehub.com/blb/1_timothy/1.htm
So, it seems “the faith”:
Was once delivered to the saints and is something we are urged to contend for.
Is in Christ Jesus and together with love for all saints proceeds out from the hope that is stored up for us in heaven, about which we heard in the word of truth, the gospel that came to us through faithful ministers of the gospel and is bearing fruit and growing all over the world where it has been announced.
Is about Jesus Christ, the Author of life, who was killed after being delivered to death by his own people, but God raised Him from the dead, and the apostles were witnesses of the fact. It is by faith in the name of Jesus, crippled men are made whole and strong (not by the apostles own power or holiness).
Is pretty well spelled out (as well as what it is not) in Chapter 1 of 1 Timothy. Read the whole chapter. I won’t summarize, give critical points, give conclusions, crystallize, make outlines for training, put my digest (regurg?) in a HWFMR, or well you get the point.
Again, I end up much preferring what the Bible actually says, versus what Lee says. Dump Lee’s book, it didn’t produce the fruit the apostles say the the faith does.