Whether the call was to believe or to follow, to do or to bear, the obedience to it sprang not from any earth-fed sources but from the infinite reservoir of strength stored up in the mountain-land above. If Moses endured it was not due to the power of resistance in his human frame, but because the weakness in him was compensated by the vision of him who is invisible. If Abraham, who had gladly received the promises, offered up his only-begotten son, it was not because in heroic resignation he steeled himself to obedience, but because through faith he saw God as greater and stronger than the most inexorable physical law of nature...Through faith the powers of the higher world were placed at the disposal of those whom this world threatened to overwhelm, and so the miracle resulted that from weakness they were made strong.
Geerhardus Vos, Grace and Glory, pp.106f
