Who goes to whom. The first move is a reversal of direction. It seems that things come at us and so throw us into confusion; Marcus inverts it: DOGMAοὐκ ἔρχεται ἐπὶ σὲ τὰ πράγματα … ἀλλὰ τρόπον τινὰ DOGMAαὐτὸς ἐπ’ ἐκεῖνα ἔρχῃ — "they do not come to you; rather you, in a manner, go to them." The qualifier τρόπον τινά ("in a manner") matters: Marcus does not deny that events occur — he says that the meeting with them, in which the disturbance is born, is arranged by you.
In two ways at once. Both forms of this going-out are named: διώξεις καὶ φυγαί — "pursuits and flights." It is the school's pair ὄρεξις / ἔκκλισις (desire and aversion), taken at its worst. What matters is that flight is called a movement toward the object no less than pursuit: the man running away is as occupied with the thing as the man running after it.
One instruction instead of a prohibition. Marcus does not order you to stop pursuing and fleeing; he orders the judge to fall silent: τὸ κρῖμα τὸ περὶ αὐτῶν ἡσυχαζέτω — "let the verdict about them keep quiet." Κρῖμα is a judicial decision, not an opinion; and the verb is a third-person imperative: not "suppress it" but "let it come to rest." The difference is practical: the work is done not on the impulse but on the judgement that produces it (cf. 8.40, 10.3).
What then happens to the things. κἀκεῖνα μενεῖ ἀτρεμοῦντα — "and they will remain unquivering." Ἀτρεμέω is "not to tremble," the word used of immobility in physics. Ordinarily it is oneself that is made calm while the world goes on moving; here the reverse: a quieted judgement restores to things their own stillness. The turbulence proves to be a property not of the world but of the relation to it.
The close is taken from the observer's side. οὔτε διώκων οὔτε φεύγων ὀφθήσῃ — "you will not be seen either pursuing or fleeing." Not "you will not pursue" but "you will not be caught at it": the result is described as an outward picture by which another might identify you. The governing discipline is assent, the sustaining one desire.
Textual note. The Greek here begins with Οὐκ ἔρχεται — so el.wikisource, and so the sense requires. The stub opened the sentence with the intrusive words «Εἰ μὲν», turning the statement into an unfinished condition; neither translation knows any such condition.