There was a companion of ours in Glasgow who became ill and was hospitalized. He was admitted for three days and on the fourth day the attendant nurse said, “Marry me”.
He [the brother in Glasgow] asked, “Why? I am a Muslim, you and I cannot become companions.”
She said, “I'll become Muslim”.
“What's the reason?” it was asked.
She said, “In all my time that I have served in hospitals, except you, I have never seen a man lower his gaze in front of a woman. In my life you are the first person who lowers his gaze when seeing a woman. I come, and you close your eyes. Such great modesty can be taught by none other than a true religion.”
The protection of one's gaze entered Islam in her. She testified to the Oneness of Allah and became a Muslim. They both got married. By now, the same woman was and is the means of bringing so many other girls / women into Islam. SUBHANALLAH!
"Tell the believing men that they should lower their gaze and guard their modesty: that will make for greater purity for them: And God is well acquainted with all that they do" [24:30]