"Physical reality is consistent with universal laws. When the laws do not operate, there is no reality." - Spock to McCoy, The Spectre of the Gun.
As a science teacher, something about that line just strikes a chord with me.
"You think that's what I want? Become one of them? Become my own enemy? Just lie around like a big blob of nothing and have things done for me? No, sir... if I want to do something, I'll do it for myself! If I want to laugh or cry, I'll do it for myself! You can keep your precious power! All I ask is one thing... if you do make it out of here, take me with you!" - Alexander to McCoy, Plato's Stepchildren. Alexander was a truly noble character, who maintained his own dignity in the face of a lifetime of physical and emotional abuse. When he's offered the chance for revenge, he not only turns it down but sneers at the very idea that he would stoop to it. Remarkable.
"Is Data a machine? Yes. Is he the property of Starfleet? No. We have all been dancing around the basic issue. Does Data have a soul? I don't know that he has. I don't know that I have! But I have got to give him the freedom to explore that question himself. It is the ruling of this court that Lieutenant Commander Data has the freedom to choose." - Phillipa's ruling on Data, The Measure of a Man.
Give a man a fire, and you keep him warm for a day. SET a man on fire, and you will keep him warm for the rest of his life...