this topic is very interesting, it point us to our belief and review our knowledged about God and our faith.
for me, my understanding about Trinity is this:
Trinity:
3 Person = 1 God.
Person 1 is not Person 2 or 3. same goes with Person 2 as not Person 1 or 3.
mathematically speaking, this cannot be because 3 not= 1. i cannot and will not understand through number.
Trinity:
1 God = 3 Person.
psychologically, this is very hard to understand, the complete unity of 3 Person as 1 God. let us take for example 2 person, say a husband and a wife. we know that no two person can think, act and agree all of the time. there will be disagreement.
another example are us commenting here, we have diff view and mind, we cannot be united and agree in the same topic. therefore we cannot be god.
God is not like that. They are in complete agreement. 1 uniqueness of God.
may the Holy Spirit enlighthen us in this area.