"The Father, like his children, was an exceptionally powerful being. He was able to touch a lightsaber blade with his bare hand, showing neither discomfort, pain, or injury from gripping the blade, and could deactivate the weapon by literally forcing the blade back into its hilt. He was also able to sense that Skywalker had approached him, and was pointing his lightsaber at the Father's face, all without so much as opening his eyes." wookiepedia, star wars wiki