Adam Clarke on 2 Timothy 2:11

If we be dead with him - That is: As surely as Christ rose again from the dead, so surely shall we rise again; and if we die for him, we shall surely live again with him. This, says the apostle, is πιστος ὁ λογος, a true doctrine. This is properly the import of the word; and we need not seek, as Bp. Tillotson and many others have done, for some saying of Christ which the apostle is supposed to be here quoting, and which he learned from tradition.