The purpose of this study is to elucidate the significance underlying the concept of miracle in the world of Old Testament thought and theology, in the hope that the results attained may shed fresh light upon something which touches the very centre of religious life and is a frequent cause of genuine doubt and perplexity for modern man. Perhaps the word miracle itself is ambiguous in this connexion, for it has gathered around itself a penumbra of associations derived from its use in our modern scientifically determined modes of thought and speech. Broadly speaking the background which it implies is that of nature conceived as an independent system presupposing fixed laws or if, with the more modern scientific outlook we reject the notion of materialistic determinism and mechanism, then, at any rate, we must substitute for ‘laws’ the tendency for uniform patterns and processes to emerge. Against such large uniformities, miracle, in the modern sense, stands out somewhat sharply as an exception, mysterious and apparently inexplicable, repugnant in its arbitrariness to the spirit of pure science. Such presuppositions do not exist in the Old Testament World of ideas where we are confronted by a type of thought which is through and through theological rather than philosophical and scientific. The corner-stone of the Old Testament system of ideas is the primacy of God as self-existent Creator whose creative activity is unceasing, upholding and interpenetrating by His watchful redeeming care all that is.