If you have become a knowledgeable person, don't be arrogant. Don't think that "I know a lot!". No matter how knowledgeable you are, you should always be modest. Even if you might have perfect knowledge, you should be willing to remain in low position. Even if you have a high throne, your mind should still be humble. Don't let your mind be disturbed by a thought like "can I get a higher position?" Be humble at all times! Be in a low position at all times! This is a good thing to do. So, train in a modest mind!
~adapted from Yangthang Rinpoche's advice in Bodh Gaya, 2012.