A man's drive for profit should be prompted by the desire to give charity.
Common sense is strengthened by joy.
Believe that none of the effort you put into coming closer to God is ever wasted - even if in the end you don't achieve what you are striving for.
A mitzvah that costs money is worth more than one that costs nothing.
Depression does tremendous damage. Use every ploy you can think of to bring yourself to joy.
The man who acts humble in order to win praise is guilty of the lowest form of pride.