Thesis 3>59
Latin
Vbicunque datur aliqua natura composita ex pluribus naturis actu in ea remanentibus, semper in ea nobilior est substantialiter, aliae accidentaliter.
English
Whenever a nature is made up of several natures that actually persist within it, the noblest of them is always present there substantially, the rest only accidentally.
Sense checked; no further crux.