Paul uses a rhetorical question to remind them of his teaching when he was with them previously. This can be expressed as a statement. AT: "I am sure you remember ... these things." (See: [[rc://en/ta/man/translate/figs-rquestion]])
This can be stated in active form. AT: "God will reveal the man of lawlessness when the time is right" (See: [[rc://en/ta/man/translate/figs-activepassive]])