There are several specific Christian elements in 'A Wrinkle in Time'. The presence of a benevolent, all - knowing force that the characters can turn to for help is similar to the Christian concept of God. The story also emphasizes the power of love, which is central in Christianity. Love is what drives the characters to fight against the darkness. Additionally, the idea of a journey towards salvation or a better state, both for the individual characters and for the world they are trying to save, has parallels to Christian teachings about the journey of the soul towards salvation.
One specific element is the concept of good versus evil. It's presented in a way similar to how it is in Christian teachings, with the good side ultimately triumphing through love and faith. Another is the idea of a higher power guiding the characters, like how God guides in Christian belief.