I collect links on this page: mahajana.lap.hu. Under "Mahayana Resourses" you find many different collections of sutras and such.
"To know by thinking falls into the secondary. To know without thinking falls into the tertiary." (Yangshan Huiji, X1405p58b18-19; tr. JC Cleary: A Tune Beyond the Clouds, p 43)
"While teachers of the middle way, mind only, transcendent wisdom, mantra, and other schools may have their own assertions, the fulfillment of those intentions is the same. There is not a single thing that is not contained within mind." (Gampopa to Düsum Khyenpa, in "The First Karmapa", KTD Pub, p 254)