A sinner cannot believe anything about the spiritual things of God, until they are gifted with faith to believe.
Love and faith in God does not come natural to corrupted souls. Their hearts, minds, wills must first be changed by the resurrection power of the Holy Spirit before they can hear or see the Gospel Truth. (Regeneration)
Nope, you're confusing the fruit of the Spirit with the faith that saves.
Galatians 5:22-23
But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness,
faith, Meekness, temperance: against such there is no law.
Eph. 2:8 For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast.
Romans 5:1-3
Therefore being justified by faith, we have peace with God through our Lord Jesus Christ: By whom also we have access by faith into this grace wherein we stand, and rejoice in hope of the glory of God.