The quote expresses a deep sense of regret and the desire to change past actions. The speaker reflects on a decision made in a moment of perceived invincibility, realizing too late its consequences. This illustrates the feeling of being young and invulnerable, only to face the reality of one's choices.
By acknowledging their mistake, the speaker accepts that they will bear the repercussions throughout their life. It highlights the theme of accountability and the hard lessons learned through life experiences, emphasizing that some choices are irreversible and carry lasting impacts.