So, the last trace of Yhwach's power has finally disappeared. Yhwach, the world that you desired to create may indeed have been devoid of fear. But in a world without the fear of death, men could not face that fear and seek out hope. Certainly, they could keep walking onward by merely living, but that would be very different from walking onward whilst conquering their own fears. This is why we give the act of walking onward a special name. We call it "courage".
— Sōsuke Aizen about Yhwach, Bleach
