When two things are closely associated, they represent one thing which has two aspects. Sometimes the one thing is hard to name.
| One thing | heavenly/spirit | earthy/flesh | |
|---|---|---|---|
| creation | heaven | earth | Ge 1:1 |
| nature of existence | without form/vain | void | Ge 1:2 |
| nature of God | light/holiness/Day | dark/love/Night | Ge 1:3 |
| relationship | evening/separation | morning/reconciliation | Ge 1:5 |
| waters/word | waters above | waters below | Ge 1:6 |
| waters below/ | seas/chosen | dry land/desolate | Ge 1:10 |