How can one God be three persons?
It is difficult for our human minds to comprehend, still we can use ‘limited’ examples to try to illustrate this. For example:
Time is one thing, right ?!
But it divided into past, present and future (3 in 1)
The space: height, width and depth (3 in 1)
The basis of matter: protons, neutrons and electrons (3 in 1)
States of matter: solid, liquid and gaseous (3 in 1)
Music: melody, harmony and rhythm (3 in 1)
God is a Tri-unity, with each Person of the Godhead equally and fully and eternally God. Each is necessary, and each is distinct, and yet all are one.