25 Ever let the privacy of your chamber guard you; ever let the Bridegroom sport with you within. Do you pray? You speak to the Bridegroom. Do you read? He speaks to you. When sleep overtakes you He will come behind and put His hand through the hole of the door, and your heart shall be moved for Him; and you will awake and rise up and say: “I am sick of love.” Then He will reply: “A garden inclosed is my sister, my spouse; a spring shut up, a fountain sealed.”
Go not from home nor visit the daughters of a strange land, though you have patriarchs for brothers and Israel for a father. Dinah went out and was seduced. Do not seek the Bridegroom in the streets; do not go round the corners of the city. For though you may say: “I will rise now and go about the city: in the streets and in the broad ways I will seek Him whom my soul loves,” and though you may ask the watchmen: “Saw ye Him whom my soul loves?” no one will deign to answer you. The Bridegroom cannot be found in the streets: “Strait and narrow is the way which leads unto life.” So the Song goes on: “I sought him but I could not find him: I called him but he gave me no answer.” And would that failure to find Him were all. You will be wounded and stripped, you will lament and say: “The watchmen that went about the city found me: they smote me, they wounded me, they took away my veil from me.” Now if one who could say: “I sleep but my heart wakes,” and “A bundle of myrrh is my well beloved unto me; he shall lie all night between my breasts”; if one who could speak thus suffered so much because she went abroad, what shall become of us who are but young girls; of us who, when the bride goes in with the Bridegroom, still remain without? Jesus is jealous. He does not choose that your face should be seen of others. You may excuse yourself and say: “I have drawn close my veil, I have covered my face and I have sought You there and have said: 'Tell me, O Thou whom my soul loves, where You feed Your flock, where You make it to rest at noon. For why should I be as one that is veiled beside the flocks of Your companions?'” Yet in spite of your excuses He will be angry, He will swell with anger and say: “If you know not yourself, O you fairest among women, go your way forth by the footsteps of the flock and feed your goats beside the shepherd's tents.” You may be fair, and of all faces yours may be the dearest to the Bridegroom; yet, unless you know yourself, and keep your heart with all diligence, unless also you avoid the eyes of the young men, you will be turned out of My bride-chamber to feed the goats, which shall be set on the left hand.
Source: Letters (New Advent)