James 4:1 change "among your fellow believers" to "in your members" since this is more literal with the Greek and less interpretive which the UDB does adequately.
The simplest rendering for the ULB may be better. Here this takes out a lot of speculation. And an unusual use of "spirit". this is still a difficult verse. Hence all the variety.
4:15, had previously "allows" but the Greek is θελήσῃ, which is one of the key terms relative to the definite will of God, and should be rendered not with "allow" but "if the Lord wills" or if the Lord is willing," here "if it is the Lord's will". No major translation has "if he allows" this implies that he is simply permitting something, but this would be boulese (Greek)boule), and certainly not θελήσῃ,