As the fly bangs against the window attempting freedom while the door stands open, so we bang against death ignoring heaven.

Horton frames human fear of death as a tragic misdirection of effort. Like a fly repeatedly striking a transparent barrier, we expend energy resisting what seems like an absolute limit, even though an “open door” (heaven, understood as divine reality or ultimate meaning) is available. The image suggests that the obstacle is partly perceptual: we fixate on the visible, immediate boundary (mortality) and miss the less obvious exit (faith, transcendence, reconciliation with God). The comparison also implies futility and self-imprisonment—our anxiety and denial can become the very thing that keeps us from spiritual freedom.