"For there are three that bear record in heaven, the Father, the Word, and the Holy Spirit: and these three are one" (1 John 5:7)
You and I are in little (our sins excepted) what God is in large. Being made in His image we have within us the capacity to know Him. In our sins we lack only the power. The moment the Holy Spirit has quickened us to life in regeneration our whole being senses its kinship to God and leaps up in joyous recognition. That is the heavenly birth without which we cannot we cannot see the Kingdom of God. It is, however, not an end but an inception, for now begins the glorious pursuit, the heart's happy exploration of the infinite riches of the Godhead. That is where we begin, I say, but where we stop no man has yet discovered, for there is in the awesome and mysterious depths of the Triune God neither limit nor end.
Shoreless Ocean, who can sound Thee?
Thine own eternity is round Thee,
Jehovah - Father, Spirit, Son -
Mysterious Godhead, Three-in-One,
Before Thy throne we sinners bend;
Grace, pardon, life to us extend. Amen
~A. W. Tozer~