John Chrysostom

And what meaneth the phrase, "The Word is nigh thee?" That is, It is easy. For in thy mind and in thy tongue is thy salvation. There is no long journey to go, no seas to sail over, no mountains to pass, to get saved. But if you be not minded to cross so much as the threshold, you may even while you sit at home be saved. For "in thy mouth and in thy heart" is the source of salvation. And then on another score also he makes the word of faith easy, and says, that "God raised Him from the dead." For just reflect upon the worthiness of the Worker, and you will no longer see any difficulty in the thing.