ἔργον δὲ καλὸν οὔτε θεῖον οὔτ ̓ ἀνθρώπειον χωρὶς ἐμοῦ γίγνεται → there is no fine work of man or god without me
experienced: P. and V. ἔμπειρος.
trusty: P. and V. πιστός, βέβαιος.