Strength by Zebrahead is an empowering anthem that focuses on resilience, perseverance, and inner strength. The song encourages listeners to face challenges head-on, find their inner fortitude, and come out stronger on the other side. Key themes include overcoming adversity, self-empowerment, and the importance of having a strong mindset. Particularly poignant moments in the song highlight personal battles and the triumphs that come from not giving up.