The laws of duality seem to be inescapable.
We read about them in the eighth chapter of Genesis, the book of Beginnings:
Speaking to Noah, God is reported to have said,
As long as the earth endures,
seedtime and harvest,
cold and heat,
summer and winter,
day and night
will never cease.”
Jesus spoke of the relationship between seedtime and harvest in John chapter 12 when he said,
Truly I tell you, unless a seed falls to the ground and dies, it remains alone. But if it dies, it produces a harvest.”
The death of the seed precedes new life.
The cold of winter precedes the warmth of summer.
The dark of failure precedes the dawn of success.
It seems to be a reliable pattern.