The concept of "3" or the "Trinity" refers to the Christian doctrine that defines God as three distinct persons in one essence: God the Father, God the Son (Jesus Christ), and God the Holy Spirit. This belief emphasizes that while each person is fully and completely God, they are not three separate gods but one unified being. The Trinity is foundational to many Christian teachings and is often represented in various symbols, such as the triangle. It highlights the relationship and unity among the three persons, illustrating how they work together in the creation, redemption, and sanctification of believers.