ὀπίσω — is the word for “in the back of” or “hereafter” or “follow” or “get in line.” From Wiktionary:

Ancient Greek[edit]

Alternative forms[edit]

• ὀπίσσω (opíssō) – Ionic

Etymology[edit]

With the prefix *ὀπί- (*opí-), from Proto-Hellenic *opí, *opi-, ultimately from Proto-Indo-European *h₁opí, a variant of *h₁epí (whence also ἐπί (epí), ἐπι- (epi-)). Compare Mycenaean Greek 𐀃𐀠 (o-pi).

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

Pronunciation[edit]

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• IPA^(key): /o.pí.sɔː/ → /oˈpi.so/ → /oˈpi.so/

Adverb[edit]

ὀπίσω • (opísō)

1. (of place) backwards quotations ▼
2. back, back again, by the same way one took quotations ▼
3. again quotations ▼
4. (of time) hereafter quotations ▼
5. following, yet to come quotations ▼Derived terms[edit]
   • ἐξοπίσω (exopísō)
   • ὄπισθεν (ópisthen)
   • ὀπίστατος (opístatos)
   Related terms[edit]
   • κατόπιν (katópin)
   • ὀψέ (opsé)
   Descendants[edit]
   • Greek: πίσω (píso)

— Wiktionary

It’s the word Jesus uses to Peter in Matthew 4:19 when he says “Δευτε οπίσω με” and also in Matthew 16:23 “’Υυπαγε οπίσω με, Σατανα”

The rebuke “get behind me Satan” is the same as the call “Come follow me, Peter”

The rebuke “you have in mind the things of man” is the same as the call “I will make you fishers of men”

We come after him willingly or unwillingly, but follow we must. The sin of leadership is the same as the sin of “minding my own business” — they are both passively involved with the things of men rather than the things of God.

This he said to the first pope, the fallible man, the weak link in the chain.

“Get in line” is the call and the rebuke.

If you find someone clinging to power, to control, to their way of doing things — if you find someone desperate to bolster “leadership culture” or “servant leaders” watch out: revocation of both the net and the leadership is the key.

But first you have to relinquish control and your ever-precious idea of how things ought to go and whether you’re in charge. Go back. Go back. Go back to the ancient paths. Go back by the same way you took. Retrace your steps and fall in line.

The only person you can control is yourself.

Everything else?

It’s about pointing to someone’s deepest desire:

The desire to follow Beauty.

The Fairest of them All.