This is a number that has followed me throughout my life!

7+7+7=21

2 is duality 1 is the undivided reality

2+1=3

3 is the bodies of reality or the trinity of nirmanakaya, sambogakaya, and dharmakaya (form, mind, and formless reality).

777777

=42 life, the universe, and everything

4 is space- time plus 2-duality

6 is the realm of physical reality experienced by humans through combination of mind and sense perception.