Augustine of Hippo
Catena Aurea · Johannesevangelium 8
Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed; And ye shall know the truth, and the truth shall make you free. They answered him, We be Abraham’s seed, and were never in bondage to any man: how sayest thou, Ye shall be made free? Jesus answered them, Verily, verily, I say unto you, Whosoever committeth sin is the servant of sin. And the servant abideth not in the house for ever: but the Son abideth ever. If the Son therefore shall make you free, ye shall be free indeed.
(de Verb. Dom. s. xlvii) We have all one Master, and are fellow disciples under Him. Nor because we speak with authority, are we therefore masters; but He is the Master of all, Who dwells in the hearts of all. It is a small thing for the disciple to come to Him in the first instance: he must continue in Him: if we continue not in Him, we shall fall. A little sentence this, but a great work; if ye continue. For what is it to continue in God’s word, but to yield to no temptations? Without labour, the reward would be gratis; if with, then a great reward indeed.