One of the main themes is the power of love. Meg's love for her family, especially her father, drives her throughout the story. Another theme is the fight between good and evil. The characters face the forces of the Dark Thing, representing evil, and they strive to bring light and goodness back. Also, self - acceptance is a theme. Meg has to learn to accept herself with all her flaws to be able to overcome the challenges.
The themes include the concept of time and space. The 'wrinkle in time' itself is an exploration of how time can be bent and space traversed in non - traditional ways. There's also the theme of the importance of individuality. Each character, like Calvin and Meg, has unique qualities that contribute to the overall mission. And finally, the theme of faith. The characters have to have faith in themselves and in the universe to succeed.