God’s plan of salvation is so simple that the least among the sons of men can grasp enough of it to experience its transforming power. At the same time, it is so profound that no inadequacy has ever been discovered in it. In fact, those who know it best are continuously amazed that one, and only one, plan of salvation is needed to meet that vast array of spiritual needs among the almost limitless varieties of the needs of men in every race, culture and condition among the nations of this world.
Guy P. Duffield and Nathaniel M. Van Cleave, Foundations of Pentecostal Theology, p179