Natural faith is our own thoughts and trust in this or that natural thing. But spiritual faith is the thoughts of God's Spirit in us, Who alone knows the things of God, and imparts them to us, and so we believe and trust in Jesus. Paul explained to the Philippians, that our faith in Jesus is given to us by God on behalf of Christ. But most people read right past this assertion by Paul, because of what follows next: that God gives us suffering for Christ's sake as well! We don't appreciate that sort of gift! We puzzle over it so much, that we fail to notice that the faith that God gives us, and the suffering He gives us, are a pair of gifts together. No doubt, the gift of faith relates to the gift of suffering, so that we may bear up under the later, by means of the former! Just a few verses later, Paul instructs us to work out our own salvation in fear and trembling, because it is God that works in us, both to will and to do His good pleasure. We only desire to obey God's will, because God works that desire in us. Then He works the ability and power in us to obey His good pleasure. Thus, God is the ultimate cause of our being willing to please Him, and our being able to please Him! Neither thing comes from us, but rather both are the powerful working of God in us. Therefore, we ought to fear and tremble at that great power of God working in us! God's power changes us in a mysterious, yet mighty way. God's power changes our will, and enables our work. We must think of this truth, and embrace it, as we recognize our desires toward God, and our labor to please God. This is a great insult to those false teachers who claim we all have an "autonomous free will."