en_tn_lite_do_not_use/2co/11/14.md

this is no surprise

By stating this in a negative form Paul is emphasizing that the Corinthians should expect to meet many "false apostles" (2 Corinthians 11:13). Alternate translation: "we should expect this" (See: rc://en/ta/man/jit/figs-litotes)

Satan disguises himself as an angel of light

"Satan is not an angel of light, but he tries to make himself look like an angel of light"

an angel of light

Here "light" is a metaphor for righteousness. Alternate translation: "an angel of righteousness" (See: rc://en/ta/man/jit/figs-metaphor)