Should I, in the following presentations, succeed as I hope in awakening the insight that a transcendental philosophy is the more genuine, and better fulfills its vocation as philosophy, the more radical it is and, finally, that it comes to its actual and true existence, to its actual and true beginning, only when the philosopher has penetrated to a clear understanding of himself as the subjectivity functioning as primal source, we should still have to recognize, on the other hand, that Kant's philosophy is on the way to this, that it is in accord with the formal, general sense of a transcendental philosophy in our definition.