 The abandonment of his residual Spinozism leads Schelling to a growing concern with the tensions which result from contradictions that are also embodied in human beings. The ages of the world are constituted by the development of forms and structures in the material and the mental world. This development depends upon the expanding force’s interaction with the contracting force’s slowing of any expansion, which allows transient but determinate forms to develop. This process also gives rise to language, which Schelling regards as the model for the development of the whole world because it manifests how expansion and the release of tension can lead to intelligibility, rather than mere dissipation: