ἔστιν δέ που ἡ μὲν ἐπὶ σώμασι γυμναστική, ἡ δ' ἐπὶ ψυχῇ μουσική → I think I am right in saying that we have physical exercise for the body and the arts for the soul
stead-fastness: P. καρτερία, ἡ, καρτέρησις, ἡ.
obstinacy: P. αὐθάδεια, ἡ, Ar. and V. αὐθαδία, ἡ.
of consistency: Ar. and P. πυκνότης, ἡ.