Jesus answered him, "Because I told you, 'I saw you underneath the fig tree,' do you believe? You will see greater things than these!"
      Secondly, In particular: "Not thou only, but you, all you my disciples, whose faith this is intended for the confirmation of, you shall see heaven opened;" this is more than telling Nathanael of his being under the fig-tree. This is introduced with a solemn preface, Verily, verily I say unto you, which commands both a fixed attention to what is said as very weighty, and a full assent to it as undoubtedly true: "I say it, whose word you may rely upon, amen, amen." None used this word at the beginning of a sentence but Christ, though the Jews often used it at the close of a prayer, and sometimes doubled it. It is a solemn asseveration. Christ is called the Amen (Revelation 3:14), and so some take it here, I the Amen, the Amen, say unto you. I the faithful witness. Note, The assurances we have of the glory to be revealed are built upon the word of Christ. Now see what it is that Christ assures them of: Hereafter, or within awhile, or ere long, or henceforth, ye shall see heaven opened.