I figured it would perhaps be easier for you if I noted the corresponding English of the first words each gloss refers to (in parenthesis and in italics), it didn't occur to me to do it before... I hope you've managed thus far with dictionaries or else. If not let me know.
(
Behold) Even if you do not understand that all justice is of god, prove it through this
(?).
a. (
has bestowed) Gratuitously. b. (
us) Who are not worthy of it.
a. (
that we should be called) In this age. b. (
and should be) In possessing the future one
(?). c. (
Therefore) Because we are called the sons of God, lovers of the world do not love us, they do not perceive our dignity, they do not respect us, but oppress us.
(
him) The father.
a. (
now) When we are despised by the world. (
it has not yet appeared) The things that God has prepared for those who love him have not ascended in man's heart.
(I have found this last sentence in Jerome's prologue to the Pentateuch, but I haven't managed to find it in the Bible. Also, both books have ascendit where Jerome on the Latin Library has ascenderunt. The difference in translation would be very slight; with ascenderunt = "the things that god has prepared have not..."; with ascendit = "what things god has prepared has not...".)
a. (
he shall appear) At the second advent. b. (
like to him) Immortal in our bodies and impassible like the son himself.
a. (
we shall see) For the sight alone makes one happy.
Blessed are the clean of heart: for they shall see God. (Matt., 5.8.) b. (
hope) That he will come to be like to God.
a. (
sanctifies himself) In the present he imitates the sanctity of God by living piously, by rejecting secular desires. Be holy like your father. b. (
whosoever commits sin) He who has hope of course sanctifies himslef, whosoever...
(abbreviations looking like f. zc, I don't know... If someone would look, fifth page from here, second column from the left; the complete sentence is qui habet spem sz sanctificat s, omnis qui f. zc.) c. (
commits) By will and by act.
a. (
iniquity) Therefore, let no one say "I am a sinner man, but I am not unjust". He who sins of course proves to be contrary to the equity of the divine law.
a. (
he appeared) At the first advent. b. (
to take away)
Behold the Lamb of God, behold him who takes away the sin of the world. (John, 1.29). c. (
and in him there is no sin) And he could do it because in him there is no sin; if there was sin in him it would need to be taken away from him. d. (
whosoever abides in him sins not) He himself is truly immune from sin, because those also who attach themselves to him, by the fact that they attach themselves, avoid sins.