The sixth aliyah states that the Torah is very accessible to us, that it is not in heaven but right here, written down and orally. And the Torah says here that the Torah is "ki korov ailecha hadavor me-ode, b'ficho, uvilvovecho, la-oso-so". Which means: "For it is exceedingly near to you, in your mouth and your heart, to do." This line is thoroughly explained by the Tanya, the written Torah of Chabad Chassidus, by Rabbi Schneur Zalman of Liadi.