“Jesus answered and said unto him, Because I said unto thee, I saw thee under the fig tree, believest thou? thou shalt see greater things than these.”
King James Version (KJV)
1:48 Under the fig tree I saw thee - Perhaps at prayer.
1:49 Nathanael answered - Happy are they that are ready to believe, swift to receive the truth and grace of God. Thou art the Son of God - So he acknowledges now more than he had heard from Philip: The Son of God, the king of Israel - A confession both of the person and office of Christ.
1:51 Hereafter ye shall see - All of these, as well as thou, who believe on me now in my state of humiliation, shall hereafter see me come in my glory, and all the angels of God with me. This seems the most natural sense of the words, though they may also refer to his ascension.