Simplify the following text for a Grade 4 native English-speaking person.
Original: For the majority of Christians , the belief in the Holy Trinity implies the existence of three distinct Holy Persons : God the Father , God the Son and God the Holy Spirit being One Eternal Triune God .
Simplified: The Holy Spirit is a part of what is known as the Holy Trinity in the Christian belief . The Trinity includes God the Father , God the Son ( Jesus ) and God the Holy Spirit .