en_tn/2co/11/15.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)

his servants also disguise themselves as servants of righteousness

"his servants are not servants of righteousness, but they try to make themselves look like servants of righteousness"