Aldersgate is highlighted from the angle of its significance on Wesley's theological thinking and subsequent ministry, rather than from an emphasis on his point of conversion. The Post-Aldersgate Wesley developed a soteriological understanding that identified a "child of God" with distinct qualifications, namely justification by faith, the experience of grace, and the indwelling Spirit. A theology of conversion also emerges with definitive markers that constitute a new standing from non-Christian to Christian. Shifts in Wesley's theological understanding of Christian faith are evaluated. Justification by faith remained a strict soteriological principle in the mind of the mature Wesley. As well, the experience of grace continued to be upheld as producing distinguishing marks in a "child of God." Accordingly a Christian's new filial relationship with God provides a newly found self- understanding. Altogether, the Post-Aldersgate Wesley developed an understanding of Christian faith that portrays how he certified a "child of God."