God Reveals Himself...

.
...in history:

That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the Word of life; (For the life was manifested, and we have seen [it], and bear witness, and show unto you that eternal life, which was with the Father, and was manifested unto us;) That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship [is] with the Father, and with his Son Jesus Christ. And these things write we unto you, that your joy may be full. (I John 1:1-4)

...and in the heart:

And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father. Gal. 4:8

For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father. The Spirit itself bears witness with our spirit, that we are the children of God: (Ro. 8:15;16)

That the God of our Lord Jesus Christ, the Father of glory, may give unto you the spirit of wisdom and revelation in the knowledge of him: (Eph. 1:17)

Stand in awe, and sin not: commune with your own heart upon your bed, and be still. Selah. (Psalm 4:4)

The mouth of the righteous speaks wisdom, and his tongue talks of judgment. The law of his God [is] in his heart; none of his steps shall slide. (psalm 37:30-31)

I delight to do thy will, O my God: yea, thy law [is] within my heart. (Psalm 40:8)

[Forasmuch as ye are] manifestly declared to be the epistle of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart. (2Cor. 3:3)

Know ye not that ye are the temple of God, and [that] the Spirit of God dwells in you? If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which [temple] ye are. (1Cor. 3:16-17)

1 Cor. 6:19 What? know ye not that your body is the temple of the Holy Ghost [which is] in you, which ye have of God, and ye are not your own?’

2 Cor. 6:16 And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in [them]; and I will be their God, and they shall be my people.

John 7:17 If any man will do his will, he shall know of the doctrine, whether it be of God, or [whether] I speak of myself.