他长期在南非宣教,并著有200多部有关基督徒信仰生活的著作. 他个人的祷告是: "May not a single moment of my life be spent outside the light, love, and joy of God's presence. And not a moment without the entire surrender of myself as a vessel for him to fill full of his Spirit and his love." 而他的著作在如今仍旧鼓励,造就着那些渴望与神同行的人.
