The significance of the number seven is derived from the Hebrew practice
of numerology. This is the association of elements, events, things, etc.
with each number. For example, the number three would mean trinity, the
number six would mean man (thus, 666 means the
Trinity of Satan, the AntiChrist, and the False Prophet), and the number eight means completion. The number seven means
perfection. This perfection does not just refer to God's plans in the Book
of Revelation, but it refers to God's complete plan which was devised before
time began, and in the plan ends in utter perfection.