Wow, brilliant. I imagine the Dalai Lama as one of the most awe-inspiring figures you are likely to meet. I have read several reports about people breaking down in tears after just being in his presence and I'm talking about non Buddhists as well, even total strangers. I certainly think he's got great charisma. I fail to understand the negative comments on this thread. Anyway I hope you gain a lot from the visit.
I've said before that I think that much of the basic philosophy that stands behind Buddhism makes a great deal of sense and could be potentially very rewarding for anybody regardless of religious thought. I'm talking in particular about the basic core principles like the four noble truths (found here for fellow Buddhist dummies like me:
http://www.buddhanet.net/e-learning/qanda02.htm) or the eightfold path of right thought, action, speech etc, etc (google it). I think that there is a great deal of wisdom even in these basic core principles and enough to last a lifetime. Of course it is easy to read and agree with it, but very difficult to put into practise.
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One of my favourite Buddhist fables is the one with the two monks by the river. Quickly, for anyone who doesn't know it - there were two monks by a river out for a walk. They spot a women who is trying to cross the other side but the water is too high for her. In this particular Buddhist order monks are absolutely forbidden to touch women, but seeing the woman struggle one of them goes over to help and lifts her across. On the way back, the other monk berates him for touching the woman reminding him that it is against orders to touch women. He can't leave it alone and throughout the walk back constantly reminds him that he has broke the order in regards to touching women, when the other turns around to him and says "brother, I put her down at the other side of the river, but you my friend, are still carrying her."
Brilliant. Like the basic concepts it makes perfect sense to let go of negative thought, but like the basic concepts it is very hard to let the things which bother us go. Now you don't have to believe in reincarnation or whatnot to see the basic wisdom behind that, same with all the core principles.