Here it is implied that "the powers" refers to powerful spiritual beings. Here "darkness" is a metaphor for things that are evil. AT: "against the powerful spiritual beings that rule over people during this present evil time" (See: [[rc://en/ta/man/translate/figs-explicit]] and [[rc://en/ta/man/translate/figs-metaphor]])
Christians should use the protective resources God gives them in fighting the devil in the same way a soldier puts on armor to protect himself against his enemies. (See: [[rc://en/ta/man/translate/figs-metaphor]])
# so that you may be able to stand in this time of evil
The words "stand firm" represent successfully resisting or fighting something. AT: "so that you may be able to resist evil" (See: [[rc://en/ta/man/translate/figs-metaphor]])