Where is the line for an Antonym?

Antonym: a word that means the opposite of another word.

Dark / Light
Storm / Peace
Off / On
Struggle / Ease

Opposite: being the other of two related or corresponding things.

Related: Connected

Darkness is the absence of Light.
Light reveals what is in the Dark.

Storms can contain moments of Peace.
Peace is as unconfined as Storms.

Being Off is just the step before turning On.
Everything On, at least once, must be turned Off.

The Struggle is as real as the button of Ease.
Ease is as undefined as the Struggle.

All of them connected, 
split by a line, 
a space between two. 

At times vast is that space,
Wide is that line,
It’s something you knew.

But what if narrow is the way?
Like a narrow thin vine,
Something growing and new.

What then?

Where is the line for your Antonym?

“The Lord will destroy the house of the proud, But He will establish the boundary of the widow.”

Proverbs 15:25 NKJV