'Demands' in the Bible

not as a result of [your] works [nor your attempts to keep the Law], so that no one will [be able to] boast or take credit in any way [for his salvation].

Therefore, put on the complete armor of God, so that you will be able to [successfully] resist and stand your ground in the evil day [of danger], and having done everything [that the crisis demands], to stand firm [in your place, fully prepared, immovable, victorious].