Proverbs 23:22-25 Listen to your father, who gave you life, and do not despise your mother when she is old. Buy the truth and do not sell it; get wisdom, discipline and understanding. The father of a righteous man has great joy; he who has a wise son delights in him. May your father and mother be glad; may she who gave you birth rejoice!
This is saying that your good works in God does not only benefit those who you aim to help, but your mother and father too. This ties in with "Love thy Father and Mother".

Proverbs 24:17-18 Do not gloat when your enemy falls; when he stumbles, do not let your heart rejoice, or the LORD will see and disapprove and turn his wrath away from him.
This is reminding you that the Lord does not punish your enemy for your 'entertainment'. Rather, He punishes them because they have sinned against Him by plotting against you. When you gloat, the Lord sees that you do not act according to His Law, and thus you are no closer to Him than your enemy.

Proverbs 25:28 Like a city whose walls are broken down is a man who lacks self-control.
This is an important warning. It is saying that if you do not practice self control, you may lose the strength that the Lord gave you, because of your sins. It is when our thoughts return to the realm of Man that we lose sight of the Lord.