Burkitt refers to this passage in his brief article as a parallel for the Valentinian speculation described by Irenaeus:
Acts of John 98-99:
98 And having thus spoken, he showed me a cross of light fixed (set up), and about the cross a great multitude, not having one form: and in it (the cross) was one form and one likeness [so the MS.; I would read: and therein was one form and one likeness: and in the cross another multitude, not having one form]. And the Lord himself I beheld above the cross, not having any shape, but only a voice: and a voice not such as was familiar to us, but one sweet and kind and truly of God, saying unto me: John, it is needful that one should hear these things from me, for I have need of one that will hear. This cross of light is sometimes called the (or a) word by me for your sakes, sometimes mind, sometimes Jesus, sometimes Christ, sometimes door, sometimes a way, sometimes bread, sometimes seed, sometimes resurrection, sometimes Son, sometimes Father, sometimes Spirit, sometimes life, sometimes truth, sometimes faith, sometimes grace. And by these names it is called as toward men: but that which it is in truth, as conceived of in itself and as spoken of unto you (MS. us), it is the marking-off of all things, and the firm uplifting of things fixed out of things unstable, and the harmony of wisdom, and indeed wisdom in harmony [this last clause in the MS. is joined to the next: 'and being wisdom in harmony']. There are of the right hand and the left, powers also, authorities, lordships and demons, workings, threatenings, wraths, devils, Satan, and the lower root whence the nature of the things that come into being proceeded.
99 This cross, then, is that which fixed all things apart (al. joined all things unto itself) by the (or a) word, and separate off the things that are from those that are below (lit. the things from birth and below it), and then also, being one, streamed forth into all things (or, made all flow forth. I suggested: compacted all into ). But this is not the cross of wood which thou wilt see when thou goest down hence: neither am I he that is on the cross, whom now thou seest not, but only hearest his (or a) voice. I was reckoned to be that which I am not, not being what I was unto many others: but they will call me (say of me) something else which is vile and not worthy of me. As, then, the place of rest is neither seen nor spoken of, much more shall I, the Lord thereof, be neither seen.