en_tn/gal/05/13.md

For

Paul is giving the reason for his words in Galatians 5:11.

God called you … to freedom

This can mean 1) "God chose you to be his people so that you(plural) can be free" or 2) "God commanded you to be free"

brothers

brothers - "brothers and sisters"

Only

or "But." Paul is saying that freedom does not include "an opportunity for the flesh."

an opportunity for the flesh

"a chance to do what pleases your(plural) sinful natures," specifically things that harm one's self or neighbors

the whole law stands fulfilled in one commandment, in this

This can mean 1) "you can put the whole law into just one commandment, which is this" or 2) "by obeying one commandment, you obey all the commandments, and that one commandment is this."