Revelation

2 = Witnesses
3 = The God Head (Trinity), therefore can be used in referring to things of Heaven
4 = Referring to earthly things (4 corners of the earth, NESW, 4 winds of the earth, 4 elements, etc.)
7 = Perfection or complete
6 = One less than 7, therefore is lacking completion or perfection, also known as the number for man
10 = Power
12 = God's chosen people