Ich muss meinen Weg gehen so sicher, so fest entschlossen und so ernst wie Duerers Ritter, Tod und Teufel. (Edmund Husserl, "Persoenliche Aufzeichnungen" ) "I must go my way as surely, as seriously, and as resolutely as the knight in Duerer's Knight, Death, and Devil." (tr. MavPhil) Note the castle on the hill, the hour glass in the devil's hand, the serpents entwined in his headpiece, and the human skull on the road.
Time is running out, death awaits, and a mighty task wants completion.