Be more zealous than you are now. Learn to understand the times. Expect him to come who is above time, the timeless one, the invisible one who became visible for our sake, the untouched one, the one beyond suffering who came to suffer for us, who in every way endured for our sake.
Toil together, fight, run, suffer, rest, and rise up together as God’s stewards, companions of his table, and his servants! Please him who is your warlord, him from whom you will also receive your soldier’s pay. Let none of you desert the flag! Let your baptism remain your armor, faith your helmet, love your spear, patience your weapon.
Source: Letter to Polycarp, ca. AD 120, as quoted in The Early Christians