The one provides the other for the one.

The one builds up the other;
The other pays for the other.
The one supports the other;
The other supports the one.

The one augments the other;
The other compels the one.
The one employs the other;
The other applies the one.

The one brings down the other;
The other weakens the one.
The one directs the other;
The other directs the one.

The one is for the other;
The other forgets the one.
The one destroys the other;
The other yearns for the one.

The other provides the one for the other.