The poet writes about it... 
The actor imitates it... 
The manipulator mimics it... 
The philosopher consumes his/her mind with it... 
The musician experiences it... 
The sculptor freezes it... 
The theologian studies it... 
The atheist indirectly acknowledges it... 
The body of embodies it... 
The senses sense it... 
Masculinity/femininity represent it... 
The elements unveil it... 
Time shapes it... 
Process/cycles preaches it... 
Coincidence reasons it... 
Uncertainty surrounds it... 
Simplicity exemplifies it... 
Feelings express it... 
The leader follows it... 
Realist celebrate it... 
Symbolist praise it... 
The life of living gives purpose to it... 
What is this "it" that can be seen but cannot be seen? 
That can be heard but cannot be identified? 
That can be felt but cannot be touched? 
That is unknown but can be named? 
I have no idea but I know that "it" is present: 
Watching, waiting, speaking and listening at all times...