O seeker of Truth!
If thou desirest that God may open thy eye, thou must supplicate unto God, pray to and commune with Him at midnight, saying:
“O Lord, I have turned my face unto thy Kingdom of Oneness and am drowned in the sea of Thy mercy! O Lord, enlighten my sight by beholding Thy lights in this dark night, and make me happy by the wine of Thy love in this wonderful age! O Lord, make me hear Thy call, and open before my face the doors of Thy heaven, so that I may see the light of Thy glory and become attracted to Thy beauty!
“Verily, thou art the Giver, the Generous, the Merciful, the Forgiving!”
At that time such signs will appear which will guide thee to the Kingdom of Thy Lord, the Merciful.
Abdu’l-Baha’, Tablets, pp. 676-677