If you are referring to verse 8 in Eph 2, The faith in that verse is referencing Christ's faith. The natural man does not have spiritual faith, which comes as a fruit of the Holy Spirit that indwells a person after he has been quickened. Eph 2:1 & 2:5.
John 1:12-13; Who did Christ give the power to become sons of God? Those that were already born of God (verse 13) are the ones that received Christ (verse 12).
1 Tim 1:16; Life everlasting is a spiritual thing that the natural man cannot discern, and thinks it to be foolishness. (1 Cor 2:14) Faith in an everlasting life only comes from our spiritual faith which we possess after we have been quickened and given the indwelling of the Holy Spirit, in which, faith is a fruit of.
I know that you think that I am misinterpreting 1 Cor 2:14, but you have not convinced me, due to the harmony of other scriptures.
Please, if you want to discuss this further, do it with an attitude that would allow both of us to be able to discuss it with respect to one another. I do admire your knowledge of the scriptures, and agree with most of them.