John 1:48 - Ellicott's Commentary On The Whole Bible

The natural explanation of the verse seems to be that Nathanael was at his own house when Philip called him to hear the glad news of the Messiah. The words rendered “under the fig-tree” include the going there and being there. It was the fig-tree of his own garden (1 Kings 4:25; Micah 4; Zechariah 3:10) where, and not at the corners of the streets, or to be seen of men, he was in the honesty of his heart praying to God. Unseen as he thought by any eye, he was seen by Him to whose coming every true Israelite looked, and the answer to the true thought and prayer was then as ever close at hand; but at hand, in the human form in which men find it so hard to read the Divine, and in the ordinary events in which men find it hard to realise God. A travelling Rabbi! He is the Messiah. From Nazareth the All Good cometh! This meeting, then, was not the first. There was an actual Messianic Presence in Nathanael’s inmost thought. He is now startled, and asks, “Whence knowest Thou me?” We have never seen each other before. But in the deepest sense, the Messiah was there; “when thou wast under the fig-tree, I saw thee.”