Ache for something you cannot have. You can feel it, taste it and it drives you mad. Your thoughts are consumed with a desire for this “thing” whatever it may be?
People can have a desire for anything, especially something that is difficult to attain. Perhaps there is the thrill of the chase?
The “what if?”
Perhaps we have some instinctual core within us stoking the fire to keep seeking whatever “it” may be.
Do you yearn for something?
You can practically taste it and even though you may never reach the goal you still move towards it?
What propels you?