Not hard and I never use the word mystery because most people do not understand what the word really means. They assume it means something hidden or not understandable when in reality (and in the Greek) is it something that was ONCE hidden but is now revealed (like the Trinity).
how many suns are in the sky if you look up during the day? one
Yet we cannot look directly at the sun because it is too bright. That is the ‘shekina’ or glory of God
Yet we can see the light that proceeds from the sun
and we can close our eyes and feel the warmth that proceeds from the sun
yet light and warmth do not change - they are still the sun
the sun is God, the light is Christ and warmth is the Holy Spirit
The doctrine of the Trinity is simply that there is one eternal being of God - indivisible, infinite. This one being of God is shared by three co-equal, co-eternal persons, the Father, the Son, and the Spirit. Three persons, or aspects, not 3 beings.
Yes, mystery refers to something that is known via revelation, something that an initiate would know, not an outsider.
I’ve heard that explanation utilizing the Sun time and again. Catholics, EOs, Lutherans, everybody uses it, but it doesn’t make sense.
We know that the light is the Sun’s light and the heat the Sun’s heat. When a sun burns out and dies, the light stops along with the heat.
The Trinity breeds heresy because it doesn’t make logical or even theological sense. Worse, the Bible itself doesn’t support the Trinitarian approach.
Do you have a better analogy or metaphor?