摩訶止觀 2.97

2.97

○四、觀非善非惡，即是無記𧄼瞢之法。所以須觀此者，有人根性，性不作善，復不作惡，則無隨自意出世因緣，奈此人何？《大論》云：「無記中有般若波羅蜜者，即得修觀也。」

Fourth, contemplation of what is neither wholesome nor unwholesome, which is the indeterminate, dull, and confused phenomena. Why is it necessary to contemplate this? There are people whose capacity and disposition do neither good nor evil; thus they lack the conditions for transcending the world according to their own minds. What can be done for such a person? The Dazhidulun says: "Prajñāpāramitā exists within the indeterminate; thus one can cultivate contemplation."