"Faith by its very nature must be tested and tried."
Yes, in that God wants us to see that by faith, by grace we are sustained, not by our own efforts.
If we believe that our efforts are key in accomplishing anything, then we have fallen from grace:
"Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage.
"Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing.
"I testify again to every man that is circumcised, that he is a debtor to do the whole law.
"Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace." (Galatians 5:1-4)
Justified by the law means that we attempt to earn anything from God. We are not called to work for anything, but instead to "work out" our salvation (cf Philippians 2:12-13), so great a salvation that was given to us by Christ's death on the Cross.