Allow me to tell you a story, about the nature of the force.
A long time ago, in a galaxy far far away, there was a Muun named Hego Damask. As the CEO of Damask Holdings, he was one of the richest and most powerful men in the galaxy. But, unbeknownst to everyone, he was secretly the Sith Lord Darth Plagueis the wise.
He used his knowledge in the force, and his vast stockpile of resources, to pursue the goal of immortality. He became so powerful, that the only thing he was afraid of was losing his power, which eventually of course he did. His manipulations caused the living force to leave him. Afterwards his apprentice, Darth Sidious; who you know as Emperor Palpatine, killed him in his sleep. But what happened next is the part of the story that gets really interesting.
On the ethereal world of Mortis, the gods of the force became disturbed by this perversion. The Daughter had flown into a rage, quite literally in fact. She flew across the world in the form of a glowing green griffin striking everything in sight and screeching in a tone that could wake the dead.
The sound was so loud that it prompted the arrival of her only equal. A shadowy gargoyle flew in and tackled the Daughter in midair. As the two tumbled through the sky, they slowly began to transform into their humanoid selves. Finally, they found themselves in a pile of rubble at the bottom of a canyon. The Son had his sister pinned to the ground as she screamed in hysteria and squirmed helplessly against his embrace.
"What troubles you sister?" He asked with equal parts concern and frustration.
"Have you been completely blinded by the darkness?" She asked in return, just as frustrated and concerned as him. "We've been violated."
"Impossible!" He responded, but even as he said it, he knew she was right. These two felt the subtle ebbs and flows in the cosmic force as if they were wind or rain. Even though the Son was sensitive to corruption, he could tell something was wrong. "How could this happen?"