So much fuss for…?

Theodore of Beza wrote in his Little book of Christian questions and responses:

If faith is necessary to salvation, and works necessarily flow out of true faith, (as that which cannot be idle), certainly it also follows, that good works are necessary to salvation, yet not as cause of salvation (for we are justified, and thus live, by faith alone in Christ), but as something necessarily attached to true faith.

Therefore, if true faith cannot be idle, is there some human way to recognize true faith but because it yields good works? So, if we cannot separate true faith and good works in reality, why do we separate them in dogma?

Let’s suppose that I publicly deny Christ even though I believe in Him. Will my inward faith save me or, despite of it, I will be condemned by my hypocrisy?