The protagonist reflects on the passage of time and life’s opportunities, feeling a sense of yearning for what lies ahead. Despite a hopeful outlook that everything appears inviting, there’s a growing uncertainty about whether he has actually been living fully or if life has moved on without him.
This sense of being overwhelmed is likened to being run over by a large vehicle, emphasizing feelings of being diminished or left behind. The metaphor of a "rumbling semi" captures the weight of these emotions, illustrating a struggle between aspiration and the sobering realization of missed chances.