If a person lacks money to support himself, he should be willing to do work that would normally be considered beneath his dignity. This is preferable to acting as if he has plenty of money, when actually he is in want of bread.
Similarly, when it comes to Torah and wisdom. A person should admit that he does not know, and be willing to ask others. Don't be embarrassed. Don't pretend you know what you do not really know. It will only cause you to remain ignorant.
Today, think of a question you would like to have answered, but have refrained from asking out of fear of embarrassment. Muster your courage and ask someone the question!
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