Genesis 2:1-3

Leaves hang and shimmy in shades of
green
greener
greenest
above my head.
Gus stretches, yawns and I just lie there...
doing nothing?
wasting time?
No, we are definitely doing something.
We are resting!
We are enjoying!
There will be more work to do but for now,
Gus and I know when to say "When"!

The idea of rest in Genesis 2 does not imply that God needed an escape from work, only that when the work was done, He knew it. 

He knew when to say "when"!
God at rest does not imply He needed to regain His strength either. God rested, or ceased His work, because He saw the value of enjoying it. He knew that humans would soon begin the wrecking of Paradise, but on the seventh day...His work was done.
So, He rested.
He enjoyed.
By stopping to take in what He had completed, God honored the moment...He "blessed" it. Creation was something to celebrate, so God memorialized it on the seventh day.
Cultures around the world have very different takes on the idea of rest. Some cultures seem to rest most of the time while others barely stop for breath. No matter where a person may fall on the continuum of work and rest,
universally,
humanity seeks enjoyment...
in work or at play or through some form of escape.
A space inside of us begs to be filled with joy, endlessly driving of us through cycles of pain and pleasure.
But there is futility in our own work and in our own enjoyment,
the sense of "my work is never done"
or
"there's never enough fun"...
God is our example.
His work and His pleasure is never futile,
never nothing
never a waste of time...

Can you stop long enough to honor His work in you? If enjoying yourself isn't working for you, begin enjoying Him.

Philippians 1:6

English Standard Version (ESV)

⁶ And I am sure of this, that he who began a good work in you will bring it to completion at the day of Jesus Christ.

On the eve of the greatest unraveling in history, God rested. 
Thousands of years later, He still works to restore His plan for the world...
starting with you.
And some day, that too will be complete.
Now that is something to celebrate!