This simile alludes to the legal type of the High-Priest, who might marry none but a Virgin.
The six-day creation story as found in Genesis (along with the seventh day of rest) provides a perfect picture of the seven dispensations as generally taught by dispensationalists. Match each day of creation with the corresponding dispensation and you see some very interesting parallels.
Ecclesiastes declares the absolute vanity of all things under the sun. Biblical vanity does not refer to an excessive care on good looks. Biblical vanity is emptiness or worthlessness.
God is a God of order. He is also a God who divides. Even on the first day of creation, He divided the light from the darkness. And, He expects His servants to rightly divide His word (2Timothy 2:15).
How, and in what respects Christ may be called a Lamb?