Why did Charles give his mind over to the dark thing in wrinkle in time?

In "A Wrinkle in Time," Charles Wallace gives his mind over to the dark thing, known as IT, because he is seduced by its promise of power and control. He believes that by submitting to IT, he can gain knowledge and strength, allowing him to better understand and confront the challenges facing his family and the universe. However, this choice ultimately reveals the dangers of losing one's individuality and free will to a malevolent force. His struggle illustrates the theme of resisting conformity and the importance of love and connection in overcoming darkness.