en_tn_lite_do_not_use/php/01/17.md

But the former

"But the others" or "But the ones who proclaim Christ out of envy and strife"

while I am in chains

Here the phrase "in chains" is a metonym for imprisonment. Alternate translation: "while I am imprisoned" or "while I am in prison" (See: rc://en/ta/man/jit/figs-metonymy)