Philthy:
How does a faith “resting” in the redemptive work of Christ manifest itself in the cooperation of our free will with God’s will in the day to day moral challenges we face as humans living in a fallen world?
First of all you must understand that every true believer is
regenerated by the Holy Spirit and is therefore “
made alive” to the things of God (1 Cor. 2:11-13). He is made painfully aware of what drastic measures it took on God’s part to redeem him (the Incarnation and substitutionary sin-sacrifice of His own Son). Though they know that ALL their sins are forgiven, even buried with Christ, the redeemed know very well they are not to live (walk) in those very sins for which their Savior had to die.
Every day we must make moral choices based on who we are now “
in Christ.” As redeemed men and women who are “
in” the world (“
cosmos,” i.e., this fallen world system) but no longer “
of” it:John 15:19 “If you were of the world, the world would love its own; but because you are not of the world, but I chose you out of the world, because of this the world hates you.”
John 17:14-21 “I have given them Your word; and the world has hated them, because they are not of the world, even as I am not of the world. I do not ask You to take them out of the world, but to keep them from the evil {one.} They are not of the world, even as I am not of the world. Sanctify them in the truth; Your word is truth. As You sent Me into the world, I also have sent them into the world. For their sakes I sanctify Myself, that they themselves also may be sanctified in truth. I do not ask on behalf of these alone, but for those also who believe in Me through their word; that they may all be one; even as You, Father, {are} in Me and I in You, that they also may be in Us, so that the world may believe that You sent Me.”
And Paul exhorts the redeemed who are no longer “of” this “
cosmos”:Rom 12:1-2 "Therefore I urge you, brethren, by the mercies of God, to present your bodies a living and holy sacrifice, acceptable to God, {which is} your spiritual service of worship. And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect.It is the redeem’s calling in Christ:Eph 4:1-3 "Therefore I, the prisoner of the Lord, implore you to walk in a manner worthy of the calling with which you have been called, with all humility and gentleness, with patience, showing tolerance for one another in love, being diligent to preserve the unity of the Spirit in the bond of peace."And this “calling” has a divine purpose and destiny far beyond this “cosmos”

hil. 3:20 "For our citizenship is in heaven, from which also we eagerly wait for a Savior, the Lord Jesus Christ; who will transform the body of our humble state into conformity with the body of His glory, by the exertion of the power that He has even to subject all things to Himself.
Therefore, my beloved brethren whom I long {to see,} my joy and crown, in this way stand firm in the Lord, my beloved."
So Phil, Paul’s question should still resonate in the hearts and minds of the redeemed: “
How shall we who have died to sin (with Christ)
still live in it?” (Rom. 6:2ff; cf. 1 Pet. 2:24).
And whatever your answer is, could you please reconcile it with Paul’s statement that if you “have all faith so as to move mountains but have not love” you are nothing?
This is all said in the
context of spiritual gifts and the exercising of them within the Body of Christ. It’s not soteriological. The gifts of the Holy Spirit are given to the redeemed for the edification of the Body. “
Faith” in this instance is not salvation faith, but the “
gift” of faith, an extraordinary faith.
All the spiritual gifts are given for the purpose of edifying the Church (by “Church” I don’t mean RCC, but the whole “body of Christ”), and not for the puffing up of one’s own ego. So if one is gifted “
all faith,” that he could even move mountains, Paul is saying he is nothing unless it is exercised in love - i.e., for the purpose of edifying and benefiting fellow believers. The same principle would apply with the exercise of the gift of tongues, healing, or prophecy. The gifts are given to serve others in the Body, in love, not to boost one’s own ego. If that is the motive when exercised, then truly, he “
is nothing.” And such motives will be revealed at the judgment seat of Christ (1 Cor. 4:5; 2 Cor. 5:10; 1 Cor. 3:10-15). A judgment reserved only for believers.