“Earth and heaven cannot contain Me; what can alone contain Me is the heart of him that believeth in Me, and is faithful to My Cause.”

"That the heart is the throne, in which the Revelation of God the All-Merciful is centered, is attested by the holy utterances which We have formerly revealed. Among them is this saying: “Earth and heaven cannot contain Me; what can alone contain Me is the heart of him that believeth in Me, and is faithful to My Cause.” How often hath the human heart, which is the recipient of the light of God and the seat of the revelation of the All-Merciful, erred from Him Who is the Source of that light and the Wellspring of that revelation. It is the waywardness of the heart that removeth it far from God, and condemneth it to remoteness from Him. Those hearts, however, that are aware of His Presence, are close to Him, and are to be regarded as having drawn nigh unto His throne."

(Gleanings from the Writings of Bahá’u’lláh, XCIII, part 5)
www.bahai.org/r/078617132