"The Spirit is the protagonist of Christian life; (it is) the Spirit – the Holy Spirit – that is in us, that accompanies us, that transforms us and is triumphant within us," he said.

A Christian earns his ability to speak with authority from the Holy Spirit, not from a theology degree, Pope Francis said during his daily Mass at the Vatican's Saint Martha Residence Sept. 2.

Explore the Christian doctrine of the Holy Spirit and the concept of the Trinity, which posits one divine essence in three persons: the Father, the Son, and the Holy Spirit. This overview highlights ...

Pope Francis celebrates morning Mass in the chapel of his residence, the Domus Sanctae Marthae, at the Vatican April 30, 2019. (Credit: CNS photo/Vatican Media.) Only through the Spirit can men ...