Charles Spurgeon Commentary Hebrews 11:16-19

"But now they desire a better [country], that is, a heavenly: wherefore God is not ashamed of them, to be called their God; for he hath prepared for them a city. By faith Abraham, being tried, offered up Isaac: yea, he that had gladly received the promises was offering up his only begotten [son]; even he to whom it was said, In Isaac shall thy seed be called: accounting that God [is] able to raise up, even from the dead; from whence he did also in a figure receive him back." — Hebrews 11:16-19 (ASV)

But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city. By faith Abraham, when he was tried, offered up Isaac: and he that had received the promises offered up his only begotten son, of whom it was said, That in Isaac shall thy seed be called: accounting that God was able to raise Him up, even from the dead; from whence also he received him in a figure.

See how faith consecrates natural affection. See also how faith laughs at impossibilities. Abraham expects that God will raise his son from the dead, or do something equally wonderful, so that the promise he had given shall be fulfilled.

It was not Abraham's business to keep God's promise for him; it was God's business to do that for himself, and he did it. You remember how Rebekah tried to make God's promise come true for Jacob, and what a mess she made by her plotting and scheming.

When we give our attention to keeping God's precepts, and leave him to fulfill his own promises, all will be well. It was Abraham's part to offer up his son; it was God's part to fulfill the promise to his seed according to the covenant which he had made.