William Shakespeare’s Sonnet Philosophy Volume 1 (Second Edition 2019) presents evidence and argument to show Shakespeare deliberately structures and numbers his philosophy into the 154 sonnets he publishes as Shakespeare's Sonnets in 1609 as the philosophy behind all his plays in the 1623 Folio. By examining the logical and numerological relation of the 154 sonnets as nature to the division into sequences of 28 Mistress sonnets and 126 Master Mistress sonnets, Volume 1 demonstrates that the Sonnets articulate the logical conditions for any mythic expression, including Shakespeare's plays. Viewing the whole set and individual sonnets – and the plays - from their inherent philosophy exposes traditional prejudices toward the set.