Themes
To die will be an awfully big adventure.
— J.M. Barrie · Peter Pan

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker looks at death with curiosity and anticipation, calling it a very large adventure rather than an ending to dread. The understatement 'awfully big' gives the thought a light, childlike courage, treating the unknown as something to be explored.
Context reviewed