"This matter of the...Trinity of the Godhead is one which we cannot use our mind to comprehend.  We cannot...simply use our mind to understand the mystery of the Father, Son, and Spirit...But if you check with your own experience, you will declare that the Lord who dwells in you is surely one...If you follow your mental understanding you will be puzzled, but by your experience you are clear that the Father, the Son, and the Spirit are the three persons of the one God."

Witness Lee
Mosaic Holy Bible page 154