The Necessity of Unity of knowing Subject in Kant's Critical Philosophy

Explaining and justifying the unit of subject or the perceptive faculty that, besides enjoying divers epistemic powers and plural cognitive activities, maintains its unique united aspect has been one of the main concerns of philosophers. In addition to the considerable differences among the principles and methods of classical and modern psychological experts and the commitment and belief to unity of subject has not faded away. Although in Kant’s critical philosophy there is no room for knowledge and theoretical awareness on the nature and essence of soul, its shown in this article that the founder of critical philosophy has not been able to refrain from surrendering and confessing to this aspect of knowing agent and has, consciously or unconsciously, acknowledged the necessity of oneness of recognizing soul.