18 But be imitators of what is good, always in a good way, and not only when I am present with you.
19 My little sons, I am giving birth to you again, until Christ is formed in you.
20 And I would willingly be present with you, even now. But I would alter my voice: for I am ashamed of you.
21 Tell me, you who desire to be under the law, have you not read the law?
22 For it is written that Abraham had two sons: one by a servant woman, and one by a free woman.
23 And he who was of the servant was born according to the flesh. But he who was of the free woman was born by the promise.
24 These things are said through an allegory. For these represent the two testaments. Certainly the one, on Mount Sinai, gives birth unto servitude, which is Hagar.