John Wesley was born in 1703 in Epworth, 23 miles (37 km) north-west of Lincoln, as the fifteenth child of Samuel Wesley and his wife Susanna Wesley (née Annesley). Samuel Wesley was a graduate of the University of Oxford and a poet who, from 1696, was rector of Epworth. He married Susanna, the twenty-fifth child of Samuel Annesley, a dissenting minister, in 1689. Ultimately, she bore nineteen children, of which nine lived beyond infancy. She and Samuel Wesley had become members of the Church of England as young adults.
As in many families at the time, Wesley's parents gave their children their early education. Each child, including the girls, was taught to read as soon as they could walk and talk. They were expected to become proficient in Latin and Greek and to have learned major portions of the New Testament by heart. Susanna Wesley examined each child before the midday meal and before evening prayers. Children were not allowed to eat between meals and were interviewed singularly by their mother one evening each week for the purpose of intensive spiritual instruction. In 1714, at age 11, Wesley was sent to the Charterhouse School in London (under the mastership of John King from 1715), where he lived the studious, methodical and, for a while, religious life in which he had been trained at home.
Apart from his disciplined upbringing, a rectory fire which occurred on 9 February 1708, when Wesley was five years old, left an indelible impression. Some time after 11:00 pm, the rectory roof caught on fire. Sparks falling on the children's beds and cries of "fire" from the street roused the Wesleys who managed to shepherd all their children out of the house except for John who was left stranded on an upper floor. With stairs aflame and the roof about to collapse, Wesley was lifted out of a window by a parishioner standing on another man's shoulders. Wesley later used the phrase, "a brand plucked out of the fire", quoting Zechariah 3:2, to describe the incident. This childhood deliverance subsequently became part of the Wesley legend, attesting to his special destiny and extraordinary work.