Sabellius

Sibelius represents modalism, with the idea that
the Trinity is God acting in different roles
depending on what God needs to do. Learning
about him teaches us that how what the church believes went through lots of changes and
arguments to get where it is today.
Jesus commands them to baptize into the Father,
Son, and Holy Spirit-not into a unipersonal God.
- Dionysius on Sabellianism