Sadhguru rules
This is one of my favorites of his:
Intelligence Gets Hijacked by Hormones
http://www.youtube.com/watch?v=kNMKdrEVhsk
If you like this stuff here are a few more gurus teaching the vedic knowledge on youtube.
http://www.youtube.com/user/LifeBlissFoundation
http://www.youtube.com/user/DattatreyaSivaBaba
How to Compress Time for Manifestation - Part 1 of 2
http://www.youtube.com/watch?v=XFM6dsiIXvY
2 os 2
http://www.youtube.com/watch?v=dDs_OlIIzIY