You understand fear, and the ring gives it form. You have to have the intent to cause fear.
This is speculation, but it's been pointed out before that ironically Green Lantern powers are determined by their mastery over "Fear," which always leads me to think that Yellow Lanterns are, in a sense, powered by their mastery over "Willpower". Granted, this is when yellow anything just doesn't punch right through green barriers. I gotta say, I still prefer Alan's original magic ring....wood weakness and all. Then again, I just prefer magic over tech anyway. Not much of a sci-fi fan.
I guess that one of the differences being that the Green Lantern's struggles are internal (passive), and dealing primarily with overcoming their own fears. The Yellow Lantern's powers are external (aggressive) attempting to strip away another person's willpower or powered by the ringbearer's own paranoia/fear in a weird kind of way of feeding on itself.
Hmmm...I don't recall it happening yet. But I wonder just how powerful Paul would be in combat if a villain brought forth his ire to the extent that all he wanted, with all of his being at that very moment, was their utter destruction. A thought mostly brought on by a ponder about just when in battle would Paul's eyes turn to the corps symbol.
You have to appreciate the wonder of life. I think I wrote once that I expereinced that for about six hours once. No drugs were involved. Honest.
I believe you. Unlike most, I don't feel drugs are ever required to experience wonder. I've had it more then once. One time when I went scuba diving while in Hawaii, with the clearest, cleanest water I've ever seen. I pretty much weighed myself down, and sat on the ocean floor for about, I dunno, 20-30 minutes, and it was amazing how much wildlife just came right up to me.
I also got to watch Hubble in an IMax theater. Amazing.