James 2:19-20, 24, 26 Thou believe that there is one God; thou does well: the devils also believe, and tremble. But wilt thou know, O vain man, that faith without works is dead? You see then how that by works a man is justified, and not by faith only. For as the body without the spirit is dead, so faith without works is dead also.
Believing in God is no proof that you are justified by faith alone, for even devils believe without justification. Abraham is used as an example in verse 21 to 23 of someone justified by works when he had gone to offer Isaac his son upon the altar. See then how his faith shaped with his works and by works was faith made perfect. It was faith that led him to this act of obedience. Had he refused to obey, it would have demonstrated that he had no faith in God or His Word. Verse 25 speaks of Rahab the harlot who was also justified by works when she had received the messengers and had sent them out another way.
Are you willing to be instructed as to the nature of true saving faith?
The body without the spirit is dead: Only the body dies at the time of physical death. This is caused by the soul and spirit leaving the body. The body returns to dust and the soul and spirit of the righteous go to heaven to await the resurrection (2Cor. 5:8; Php. 1:21-24). The soul and spirit of the wicked go to hell to await the resurrection (Lk. 16:19-31; Isa.14:9; Rev. 20:11-15). The soul and spirit are spiritual and immortal. They cannot go back to dust. Just as surely as the inner man leaves the body at physical death and is no longer with the body, so faith without works is dead (separated) and is powerless.