154:2.5

Universe difficulties must be met and planetary obstacles must be encountered as a part of the experience training provided for the growth and development, the progressive perfection, of the evolving souls of mortal creatures. The spiritualization of the human soul requires intimate experience with the educational solving of a wide range of real universe problems. The animal nature and the lower forms of will creatures do not progress favorably in environmental ease. Problematic situations, coupled with exertion stimuli, conspire to produce those activities of mind, soul, and spirit which contribute mightily to the achievement of worthy goals of mortal progression and to the attainment of higher levels of spirit destiny.