The Power of One Letter

دل گفت مرا علم لدنّی هوس است
تعليمم ده گر تو را دسترس است
گفتم که "الف" گفت دگر هيچ مگوی
در خانه اگر کس است يک حرف بس است

[my translation]

My heart hinted, "I desire eternal knowledge,
Teach me, if it's within your reach!"
No sooner than I said "A," did it say, "utter no more!"
In this abode, one letter shall suffice!

Imagine how one letter can be so powerful... I would like to share with you the Hidden Word by the Blessed Beauty that demonstrates the power of one letter, if it is uttered in the right context:

77. O SON OF JUSTICE!
In the night-season the beauty of the immortal Being hath repaired from the emerald height of fidelity unto the Sadratu'l-Muntahá, and wept with such a weeping that the concourse on high and the dwellers of the realms above wailed at His lamenting. Whereupon there was asked, Why the wailing and weeping? He made reply: As bidden I waited expectant upon the hill of faithfulness, yet inhaled not from them that dwell on earth the fragrance of fidelity. Then summoned to return I beheld, and lo! certain doves of holiness were sore tried within the claws of the dogs of earth. Thereupon the Maid of heaven hastened forth unveiled and resplendent from Her mystic mansion, and asked of their names, and all were told but one. And when urged, the first letter thereof was uttered, whereupon the dwellers of the celestial chambers rushed forth out of their habitation of glory. And whilst the second letter was pronounced they fell down, one and all, upon the dust. At that moment a voice was heard from the inmost shrine: "Thus far and no farther." Verily We bear witness to that which they have done and now are doing.