  All this is predicated on the supposition of our intuitive access to psychological or primary life through “self-reflection” [Selbstbesinnung]. Yorck interprets Dilthey's insight that one cannot go beyond life to mean that one cannot surpass or transcend “the empirical givenness of self-consciousness,” which entails that philosophy is “empirical,” not speculative (ST, pp. 8, 3). Evidence can only be found in self-consciousness. What does not pass the test in one's own life cannot count as a valid expression of life: The seat of all necessary truth is “self-experimentation” (ST, 9, also 54).[9]