Matthew Poole and continuators on John 1:47

47 Jesus saw Nathaneel coming to him, and saith of him, Behold an Israelite indeed , in whom is no guile .

They are not all Israelites, which are of Israel, Rom. 9.6. For he is not a Iew, which is one outwardly: neither is that circumcision, which is outward, in the flesh: But he is a Iew which is one inwardly, and circumcision is that of the heart, in the Spirit, Rom. 2.28, 29. Christ seeing Nathanael (though he was prejudiced by Philips mistake, or the common mistake of his Nation) coming to see him, and seeing not onely his body and bodily motion, but his heart also, and the motions of that, saith of him, Behold one who is not onely born an Israelite, but is a true Israelite, like his Father Iacob, a plain Man, Gen. 25.27.

In whom there is no deceit, no doubleness of heart; such ought Christians to be, no crafty, deceitful, double-minded men, but men of great sincerity, and plainness of heart, laying aside all malice, and all guile, 1 Pet. 2.1. like little Children, Matth. 18.3.