A profound thought. Augustine talks here about his mother’s intense, life-long prayer that he would be converted:
I see not then how she should have been healed, had such a death of mine stricken through the bowels of her love. And where would have been those her so strong and unceasing prayers, unintermitting to Thee alone? But wouldest Thou, God of mercies, despise the contrite and humbled heart of that chaste and sober widow, so frequent in almsdeeds, so full of duty and service to Thy saints, no day intermitting the oblation at Thine altar, twice a day, morning and evening, without any intermission, coming to Thy church, not for idle tattlings and old wives’ fables; but that she might hear Thee in Thy discourses, and Thou her in her prayers. Couldest Thou despise and reject from Thy aid the tears of such an one, wherewith she begged of Thee not gold or silver, nor any mutable or passing good, but the salvation of her son’s soul? Thou, by whose gift she was such? Never, Lord.
Yea, Thou wert at hand, and wert hearing and doing, in that order wherein Thou hadst determined before that it should be done. Far be it that Thou shouldest deceive her in Thy visions and answers, some whereof I have, some I have not mentioned, which she laid up in her faithful heart, and ever praying, urged upon Thee, as Thine own handwriting. For Thou, because Thy mercy endureth for ever, vouchsafest to those to whom Thou forgivest all of their debts, to become also a debtor by Thy promises.
– St. Augustine, The Confessions
A debtor to His promises. Think about it:
So when God desired to show more convincingly to the heirs of the promise the unchangeable character of his purpose, he guaranteed it with an oath, so that by two unchangeable things, in which it is impossible for God to lie, we who have fled for refuge might have strong encouragement to hold fast to the hope set before us. We have this as a sure and steadfast anchor of the soul, a hope that enters into the inner place behind the curtain, where Jesus has gone as a forerunner on our behalf…
– Hebrews 6:17-20a
What a promise. God became a debtor to Himself. To fulfill His promises to us. Thank God.