The papar reconstructs in general outline philosophical transcendentalism which was first formulated in the critical writings of Kant, then further developed in his theory of knowledge, and finally made conceptually more precise in the works of Fichte. These two philosophers, Kant and Fichte, are not discussed here as concrete thinkers or authors but as participants and representatives of sense making events and processes which have developed and unfolded in their texts and treatises. Two different though related questions are submitted to close scrutiny. First, what has happened with the Kantian idea of transcendentalism, how has it modified the previous configuration of questions, problems and concepts connected with the philosophical theory of human knowledge? And secondly, why did Fichte's 'Wissenschaftslehre', and not some previously written philosophical work, manage to lay bare theoretical consequences of that event, and why this work rather than any other has showed the way for the future course of the ensuing process of thought.