Mark the seasons [(tous kairous)]. Await him that is above every season [(kairon)].

πλέον σπουδαῖος γίνου οὗ εἶ.  τοὺς καιροὺς καταμάνθανε.  τὸν ὑπὲρ καιρὸν προσδόκα, τὸν ἄχρονον, τὸν ἀόρατον, τὸν δι' ἡμᾶς ὁρατόν, τὸν ἀψηλάφητον, τὸν ἀπαθῆ, τὸν δι' ἡμᾶς παθητόν, τὸν κατὰ πάντα τρόπον δι' ἡμᾶς ὑπομείναντα.

     Epistle of St. Ignatius to Polycarp III.2.

Lightfoot:

Be more diligent than thou art.  Mark the seasons.  Await him that is above every season, the Eternal, the Invisible, who became visible for our sake, the Impalpable, the Impassible, who suffered for our sake, who endured in all ways for our sake.

Lake:

Be more diligent than you are.  Mark the seasons.  Wait for him who is above seasons, timeless, invisible, who for our sakes became visible, who cannot be touched, who cannot suffer, who for our sakes accepted suffering, who in every way endured for our sakes.

Ehrmann:

Universalis:

Increase your efforts and watch for opportunities.  Look out for the one who is above time and has no need for opportunities:  the Invisible who became visible for us, the Intangible who is above suffering and yet suffered for us, who in every way endured for our sake.

divineoffice.org:

Increase your zeal. Read the signs of the times. Look for him who is outside time, the eternal one, the unseen, who became visible for us; he cannot be touched and cannot suffer, yet he became subject to suffering and endured so much for our sake.