Hebrews 11:17
17By faith, Abraham, being tested, offered up Isaac. Yes, he who had gladly received the promises was offering up his only born son,
Wesley: when God made that glorious trial, Abraham offered up Isaac—the will accepted as if he had actually done it. He that had received the promises, particularly “In Isaac shall thy seed be called,” offered up this very son, the only one by Sarah.
The note struck is a trial answered by obedience of faith. The promises are not discarded; they are trusted in the dark. Pastoral force: faith can be tested severely and still offer what God asks.
Calvin: this trial surpassed every other; God is said to have then in an especial manner tried him. The act flowed from faith; Abraham had nothing more excellent than faith, which brought forth such extraordinary fruit. The resolution to obey was as though he had actually sacrificed his son.
Testing proves what faith God has wrought. Offering the only son of promise is faith’s fruit, not a gamble that may fail God’s election.