In 'Children' by Justin Bieber, the song is a powerful, upbeat anthem that encourages global responsibility and awareness for the future. The lyrics challenge listeners to think about the legacy they are leaving for the next generation and inspire action to support and protect children around the world. Key themes include activism, hope, and the pivotal role that youth play in shaping the future. Particularly poignant moments in the song are the repetitive calls to action, urging adults to take responsibility and make a difference for the children who will inherit the world.