Abrahams faith was based on a very simple idea: God will do as he has said even if I cannot understand how. This explains, for example, how we may believe in heaven with full assurance even though we have never seen it.
Will we live on the basis of what God has said or restrict ourselves to what our eyes can see?
(ESV) Romans 4:18-19
In hope he believed against hope, that he should become the father of many nations, as he had been told, So shall your offspring be. 19 He did not weaken in faith when he considered his own body, which was as good as dead (since he was about a hundred years old), or when he considered the barrenness of Sarah’s womb.
Sometimes I imagine Paul in an ironic humor thinking about all those who would later try to untangle one of his phrases that his associate Peter said were hard to understand (2 Pet. 3:16). We have one of those phrases in Romans 4:18 where the sequence against hope, on the basis of hope occurs. Oh my!
When confronted with such a paradoxical combination, Bible translators have their work cut out for them. However, in this case we have definite help from the immediate context. Grant Osborne points out, The most amazing fact of all is that Abraham accepted his physical situation without weakening in his faith (verse 19), another way of expressing the same idea as in verse 18: against hope, he hoped. That is all the guidance needed to unravel the puzzling phrase in 4:18.
Of course, the phrase against hope looks at the fact that Abraham was about a hundred years old (4:19) as well as the barrenness of Sarahs womb (4:19). The counter-phrase in hope informs us that in spite of the seeming impossibility, Abraham had a solid expectation of descendants as he had been told (4:18).
(ESV) Romans 4:19 He did not weaken in faith when he considered his own body, which was as good as dead (since he was about a hundred years old), or when he considered the barrenness of Sarah’s womb.
C.E.B. Cranfield, when read carefully, does an excellent job explaining Pauls take on the faith of Abraham: Because of his unweakened faith, Abraham considered steadily, without attempting to deceive himself, his unpromising circumstances, but, as verse 20 goes on to indicate, did not allow what he saw to make him doubt Gods promise. Abraham did not close his eyes or fool himself.
Since Christian faith is sometimes portrayed in cartoon-style as a leap-into-the-dark, Douglas Moo says, Abrahams faith is not described as a leap into the dark, a completely baseless, almost irrational decision . . . but as a leap from the evidence of his senses into the security of Gods word and promise.
Science and faith are not enemies
Life is odd sometimes. The religion which named itself Christian Science is neither Christian nor scientific; one of its key beliefs is that disease is an illusion. But that type of denial is not what Christian faith, as taught in the Bible, is about.
There should be no final conflict between science and Christian faith because both should look unflinchingly at reality. But science cannot put God in the test tube any more than Christianity can solve the equations of quantum mechanics. Christians should be as clear-eyed as the most meticulous scientist, and, indeed, Christianity has produced some of the greatest scientists.
Science can only deal with issues that can be tested by the scientific method. It cannot tell you whether Caesar was stabbed in 44 B.C. or whether Jesus Christ will return to rule the world. Science cannot tell you whether murder offends God or what God will do about it. Faith is the only appropriate way to deal with what God has said and done.
1. What has God promised you that you cannot prove in a court of law or a lab? 2. Do you ever feel uncomfortable, as a person living in the twenty-first century, about responding to God with faith? Why or why not?
Christian faith views the world as a system in which God has decisively intervened. He created the world, sent his Son to save it, and will replace it with a new creation in due course. Faith knows these things because God has revealed them, not because we can see it!
Copyright 2012 Barry Applewhite, Plano, Texas. All rights reserved worldwide. Derived from materials created for Christ Fellowship, McKinney, Texas. Used by permission.
 Douglas Moo, The Epistle to the Romans, The New International Commentary on the New Testament (Wm. B. Eerdmans Pub. Co., 1996) 282.
 Grant R. Osborne, Romans, The IVP New Testament Commentary Series (Downers Grove: InterVarsity Press, 2004) 118.
 C.E.B. Cranfield, The Epistle to the Romans, The International Critical Commentary (Edinburgh: T.&T. Clark Limited, 1975) 247.
 Moo, Romans, 282-283.