en_tn_lite_do_not_use/2co/11/14.md

this is no surprise ... It is no great surprise if

By stating this in a negative form Paul is emphasizing that the Corinthians should expect to meet many "false apostles" (2 Corinthians 11:13). AT: "we should expect this ... We should certainly expect that" (See: rc://en/ta/man/translate/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. AT: "an angel of righteousness" (See: rc://en/ta/man/translate/figs-metaphor)