Aleph

—Aleph.—Man himself as a collective unity, a principal, the lord and master of the earth. The universal man, and the human genre. Esoterically, unity, the central point, the abstract principle of a thing; as a sign it expresses power, stability, and continuity; the superlative, a kind of an article, as a prefix rendering the meaning more serious and enhancing its significance.
Its arithmetical value is 1.

Mysteries of the Qabalah, by Elias Gewurz,