"Nothing that actually happens is of the slightest importance."
Yes, indeed. If I may, let me supplement that with two others that I often turn to when I need a clear perspective:
"What do we matter? Our whole lives are experiments; let us also want to be them!"
"We're all scared. You hid in that ditch because you think there's still hope. But Blithe, the only hope you have is to accept the fact that you're already dead."
- Ronald Speirs (from Band of Brothers)