Time. It is the force that drives our entire existence. It is uncaring, unyielding, and unstoppable. Occasionally the waves of time take somepony we love with them, and we wish for nothing more than to turn back the clock to save them. The hardest lesson to learn is when to let go. {WARNING DO NOT READ THE COMMENTS! There are usually spoilers.}
Coverart by VexPon: vexpon.deviantart.com