en_tn/jas/04/15.md

Instead, you should say

"Instead, your attitude should be"

we will live and do this or that

"we will live long enough to do what we have planned to do." The word "we" does not directly refer to James or his audience but is part of the example of how James' audience should consider the future.

for anyone who knows to do good but does not do it, for him it is sin

Anyone who fails to do the good he knows he should do is guilty of sin.