Great!
So we agree that "believing" is pleasing to God.
Rom. 8:2 For the law of the Spirit of life has set you
2 free in Christ Jesus from the law of sin and death.
3 For God has done what the law, weakened by the flesh, could not do. By sending his own Son in the likeness of sinful flesh and for sin,
3 he condemned sin in the flesh,
4 in order that the righteous requirement of the law might be fulfilled in us, who walk not according to the flesh but according to the Spirit.
5 For those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit set their minds on the things of the Spirit.
6 For to set the mind on the flesh is death, but to set the mind on the Spirit is life and peace.
This passage is similar to 1 Cor. 2:14, only where Paul contrasts the "psuchikos" ("natural") with the "pneumatikos" ("spiritual") in 1 Cor. 2, he contrasts the "sarkos" ("flesh") with the "pneuma" ("spirit") in Rom. 8.
Rom. 8:7 For the mind that is set on the flesh is hostile to God, for it does not submit to God’s law; indeed, it cannot.
8 Those who are in the flesh cannot please God.
1) You agree "believing" is pleasing to God.
2) Paul teaches that those "in the flesh" cannot please God.
3) Therefore those "in the flesh" (as opposed to "in the spirit") cannot believe.
Have a nice day!