What do you think about nr 7?

It is something mysterious with the number 7.

7

The number 7 is the seeker, the thinker, the searcher of Truth (notice the capital "T"). 7 doesn't take anything at face value -- it is always trying to understand the underlying, hidden truths. The 7 knows that nothing is exactly as it seems and that reality is often hidden behind illusions.

The 7 is spiritual, but not religious. In fact, the age-old questions of what life is all about, why are we here, who we are and so forth.

It's is...

7 Senses: sight,smell, touch, taste, hearing, intuition, equilibrium
7 Days of the week
7 Visible planets
7 Days of creation in genesis
7 Colors of the rainbow
7 Inflections of the voice
7 Holes in your head
7 Motions of the hands
7th days after birth the umbilical falls off
7 Parts of the body
7 Chakras
7 Seven Seas 
7 Wonders of the world7 Deadly Sins
7 Continents
7 Body Orifices
7 Notes in a music scale
7 Major metals
7 Phases of the moon
7 Natural divisions of the brain
7 Functions of the nervous system
7 Compartments of the heart
7 Major body organs
7th Heaven
Flowering plants of a pure strain have 7 outside petals. The Lotus is one
All religious texts symbolism is centered around 7
And it's keep on going..

Everything is connected, in one way or another. 
I find it pretty interesting, don't you?