How then do we develop a Trinitarian mind so that we emerging out of our Trinitarian Faith?

I would suggest that we must continually reflect on God’s Self-Revelation.   God has revealed HIMSELF to us. So we don’t begin by projecting a concept of God as One Divine Essence and say that’s God. How do I now I make One include three. No. We begin with Who God has unveiled himself to be and we continually reflect within his self-revelation. 

How then do we develop a Trinitarian mind so that we emerging out of our Trinitarian Faith?

I would suggest that we must continually reflect on God’s Self-Revelation.   God has revealed HIMSELF to us. So we don’t begin by projecting a concept of God as One Divine Essence and say that’s God. How do I now I make One include three. No. We begin with Who God has unveiled himself to be and we continually reflect within his self-revelation.