Vous avez cherché: et velle et perficere (Latin - Anglais)

et velle et perficere
and he wants to complete the

deus est enim qui operatur in vobis et velle et perficere pro bona voluntat
for it is god which worketh in you both to will and to do of his good pleasure.

unum velle et unum nolle
une volonté et une volonté

vetera novis augere et perficere
old should be expanded

et consilium in hoc do hoc enim vobis utile est qui non solum facere sed et velle coepistis ab anno prior
and herein i give my advice: for this is expedient for you, who have begun before, not only to do, but also to be forward a year ago.