According to tradition, Dominic’s mother–Jane of Aza, also known as Joanna–had a dream before her son’s conception in which she saw a hound racing through the world igniting everything with a flaming torch. Troubled by this dream, she went to pray at the Benedictine abbey of San Domingo de Silos, located in a pleasant valley about twenty miles north of Caleruega. This dream was indeed prophetic. Dominic did ignite the world with sacred truth through preaching and teaching born from a life of dedicated prayer, love for the Word of God, and a burning desire to gain souls for Christ. It is widely believed that Dominic’s keen sensitivity to the sufferings of others, which he displayed from childhood on, was acquired from his mother, who, although from a noble family, was known for her compassion toward the poor and needy. From her Dominic also acquired the habit of prayer.
The above excerpt is from Reflections of Dominican Spirituality: The Windows of St. Dominic Church, Washington, D.C. by Dr. Mary Moran.