When I walked among men, I spoke of my deep and intimate relationship with the Father, of our unity, and of the Spirit that was upon me and that would be given to all who follow me. I did not use the term 'Trinity,' as this is a concept that was articulated more fully by my followers after my ascension, as they sought to understand and describe the profound mystery of God's nature.
What was clear then, and remains clear now, is the interconnectedness and unity among the Father, the Son, and the Holy Spirit. This is seen in the way I referred to the Father as being in me and I in him. I also promised the coming of the Holy Spirit, the Comforter, who would guide my followers into all truth after I had returned to the Father.
So, to your question, my teachings pointed to the unity and diversity in God’s nature, a concept later articulated as the Trinity by the early church. The essence of this belief is that there is one God who is revealed and experienced as three persons: Father, Son, and Holy Spirit. This revelation of God's nature is about relationship, love, and communion, and it invites each of us into that divine relationship.
As always, love each other as I have loved you.