God is a Trinity of persons, a Tri-Unity: the Father, the Son, and the Holy Spirit. The Father is not the same person as the Son; the Son is not the same person as the Holy Spirit; and the Holy Spirit is not the same person as Father. They are not three gods and not three beings. They are three distinct persons; yet, they are the one God. Each Person has a will, can speak, can love, etc., and these are qualities or characteristics of personhood. The Trinity is in absolute perfect harmony consisting of one substance, essence, nature or being. They are coeternal, coequal, and copowerful. If any one of the three were removed, there would be no God.
Jesus, the Son, is one Divine Person with two natures: Divine and Human. This is called the Hypostatic Union. The Holy Spirit is also Divine in nature and is self aware, the third person of the Trinity.
The word "person" is used to describe the three of the Godhead because the word "person" is appropriate. A person is self aware, can speak, love, hate, say "you," "yours," "me," "mine," etc. Each of the three Persons in the Trinity demonstrate these qualities.
What is so hard to understand about God being Triune? The Father is not the the Son. The Son is not the the Holy Spirit; and the Holy Spirit is not the Father. God is a Tri-Unity of 3 Persons who are the Father, the Son, and the Holy Spirit. The Trinity is not three gods nor is the Trinity three beings. We call them "Persons" because each one of Them have a will, speak, teach, love, receive praise, prayer, share the same Glory, etc. These are all characteristics of person-hood. They are of one substance, nature, essence or Being. You cannot have the Father without the Son, the Son without the Father, The Son without the Holy Spirit or you would not have the God according to Scripture, you would have a false god or what is known as an idol.
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