Some gems I came across in a book at Ban Thai Guesthouse, Sukhothai, Thailand:
Intellectual knowledge can be a major obstacle on the path to real knowledge, especially if this knowledge is used with haughty pride.
Try to understand that tranquility, peace and quietness is (sic) not found outside. Wishing for the world to be quiet for you is absurd.
Take your life as it is. Do not think: 'It could have been like that'. Do not curse one of all your days. Whatever you have to bear, bear it! Everything whatever crosses your way, bless it, and you will be blessed.
Always be reasonable.