| Link | Quote | Stars | Tags | Author |
| 18b374f | Only those who will risk going too far can possibly find out how far one can go. | Challenge | ||
| c22bb5a | The greatest challenge to any thinker is stating the problem in a way that will allow a solution. | Challenge | ||
| 64c6f36 | There I throw my gage,Of mortal breathing. | Challenge | ||
| 6addc1a | But thou liest in thy throat; that is not the matter I challenge thee for. | Challenge |