Since the very first day that people began to develop the concept of numbers, certain amounts have always taken on greater significance than others. First and foremost of these is the natural number which follows 6 and precedes 8. At that moment, when prehistory became history, numerologists and mathematicians were one and the same. So, several thousand years ago, there were many different connotations associated with the concept of numbers, particularly 7. The first philosopher Pythagoras dubbed it the “Septad”.
Although there are really only six main colors of the rainbow — red, orange, yellow, green, blue, and violet — Sir Isaac Newton strongly believed in the sacred significance of the Septad. Thus, he added indigo into the mix to get the specific results that he wanted. This is how and why the modern ROYGBIV spectrum of hues was created. The thing is that Newton isn’t the only person that is either consciously or subconsciously aware of the significance of seven.
When asked to think of a number between 1 and 10, researchers have found that a major percentage of people will say the number 7. The same thing also tends to happen when a large group of people is asked what their favorite number is. The answer is overwhelming “7”, but why is that? Well, for one thing, in addition to being the “holy number”, seven is also the “lucky number”. In this way, superstition continuously perpetuates this belief, as more and more people make the same associations. Plus, of all the nonhuman animals that can count, none of them can count any higher than seven. There’s just something odd about that amount (pun intended).
Again, the significance of the Septad is mainly mystical though. This spiritual tie to 7 is why so many different cultures consider it to be sacred. For instance, in the Biblical myth of creation, God made the world in six days and rested on the seventh. Thus, to many Christians, the number seven represents perfection or completeness. In Judaism and Islam, there are Seven Heavens, and Muslims walk around the Kaaba seven times during their pilgrimage to Mecca. As yet another example, in Confucianism, seven represents harmony, through Yin and Yang combined with the Five Elements: water, fire, earth, wood, and metal.
Among the Abrahamic faiths, 3 and 7 are both divine numbers with miraculous properties. This is why what I call the Triple Septad is the holiest of all numbers. 777 represents the threefold perfection of the Trinity. Another aspect of this is that the number 777, as triple 7, can be contrasted against triple 6. Thus, opposing the Number of the Beast 666. Jackpot! This is all then brought together in the occult under the Law of Thelema in the book 777 and Other Qabalistic Writings of Aleister Crowley. It is for this and so many other reasons that seven is and will always be the sacred Septad. Long live the spirit of number seven, and praise be to the Triple Septad.