the Root Principle of Faith

Here is the Root Principle of Faith as revealed by the Bab in the Epistle of Justice:

"Know thou that the essence of religion is the knowledge of God. The perfection of this knowledge is belief in His unity. The perfection of this belief is the negation of all names and attributes before His sanctified Essence. And the perfection of this negation is to immerse oneself with certain knowledge in the Ocean of oneness and to witness one's attainment to its bounty. And the truth underlying all these stages is the Sign of God alone, whereby the existence of the Lord of might and glory is recognized and known with certitude."
Gate of the Heart, by Nader Saiedi, p. 230