Kepler is the patron saint of quantum gravity and 15 May was the day Kepler had a really new idea which he called "sesquipotentia" or "one and a half power" law. He recorded in his diary that the idea had occurred to him on 8 March but he dismissed it, thinking it was wrong, and then on 15 May it "returned and stormed the darkness of my mind". I suppose that whenever science is done it is done with the understanding that this kind of thing can happen----something can suddenly appear and storm the darkness of your mind. If you happen to be needing a really new idea then maybe it would not hurt to pray to Kepler, as one may, to saints. Or light a candle. Or drink a toast of favorite beverage. Or do whatever it is that one does. I suspect theoretical physicists nowadays do need a really new idea, or several of them. Maybe they have already thought all the new ideas they need right now and merely havent noticed----so the ideas are hanging out and waiting for some time when they will return and storm the darkness of the theoretians' minds. But in any case some of them SAY they need a really new idea. Like David Gross did famously not long ago. And in that case it might not hurt to pray to Kepler. He worked hard on it and got some extremely new ones. Like spacetime was constructed of ovals instead of transparent spheres with circular tracks around the middle. People are always wondering what spacetime is constructed of. Nested Platonic solids, whatever. Spin networks. heh heh. I intend to drink a beverage in honor of Kepler on the 15th and to reflect on the fact that we do every now and then need a really new idea.