Though Gabirol as a philosopher was ignored by the Jewish community, Gabirol as a poet was not, and through his poetry, he introduced his philosophical ideas. His best-known poem, "Keter Malkut" ("Royal Crown"), is a philosophical treatise in poetical form, the "double" of the "Fons Vitæ". For example, the eighty-third line of the poem points to one of the teachings of the "Fons Vitæ"; namely, that all the attributes predicated of God exist apart in thought alone and not in reality.