God has revealed Himself to be the Holy Trinity, one God in three eternally distinct Persons: Father, Son, and Holy Spirit (Matthew 28:19; John 14-16; etc.).

Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit

Matthew 28:19

And I [Jesus] will ask the Father, and he will give you another Helper [Holy Spirit], to be with you forever…

John 14-16