Born and raised in England, Keith went to college in Aberystwyth, Wales. There he had the blessing of a Christian roommate and the ministry of Pastor Geoffrey Thomas and, in 1964, came to a saving knowledge of Christ. After finishing college, Keith went to Kenya to teach school for more than two years and then, having been called to the ministry, went to Westminster Theological Seminary in Philadelphia. During that time he married his wife, Priscilla. Then in 1978 they returned to Nairobi where Keith has been pastoring ever since.