 Gnostics borrowed significant ideas and terms from Platonism, using Greek philosophical concepts throughout their text, including such concepts as hypostasis (reality, existence), "ousia" (essence, substance, being), and demiurge (creator God).Both Sethian Gnostics and Valentinian Gnostics seem to have been influenced by Plato, Middle Platonism, and Neo-Pythagoreanism academies or schools of thought.Both schools attempted "an effort towards conciliation, even affiliation" with late antique philosophy, and were rebuffed by some Neoplatonists, including Plotinus.