I've heard this one, as well. Two of these brothers walked out of the desert 150 years after having found the Grail and began the long journey back to France, but only one of them made it. And before dying of extreme old age, he supposedly imparted his tale to a... to a Franciscan friar, I think.

★ Merry ★* 。 • ˚ ˚ ˛ ˚ ˛ •
•。★ Christmas ★ 。* 。
° 。 ° ˛˚˛ * _Π_____*。*˚
˚ ˛ •˛•˚ */______/~＼。˚ ˚ ˛
˚ ˛ •˛• ˚ ｜ 田田 ｜門｜ ˚ ☃
☆¸.•°*”˜˜”*°•.¸☆ ★ ☆¸.•°*”˜˜”*°•.¸☆
and Happy New Year ☆ 2018

There is evidence that shows that your frame of mind can greatly affect your success. In particular, if you have a growth mindset (you believe that with practice your abilities can improve) you are often more successful than if you have a fixed mindset (you believe that you can either do or not do something). We invite you to take a growth mindset to mathematics: with regular practice, you will improve your skills.