Vasubandhu the leading proponent of Yogacara school ,write on the 30Verse of Yogacara
It is a series of Question and answer on the Mind that give a solid answer to how come we always faced difficulties though we are dilligence Buddhism
the Reason for Neither Emptiness nor Inherent Existence give a complete
understanding to the mechanism of Karma functioning in our everyday life
I will give more posting in future
Maybe one may find its just a metaphysical work or plain philosophy ,but the works are written by Vasubandhu when He is ordered by the Central Indian Kingdom to have a debate session with the 20 over state-sponsored Brahmanism priest in India ,losing the debate will result in heads chop off .
Of course with the perfect insight to Emptiness ,Madhyamika and Yogacara teaching ,Vasubandhu wins the debate and they willingly convert to spare the death row