Idioms
When someone has done something bad to you, trying to get revenge will only make things worse
You can't live completely independently everyone needs help from other people
What is No man is an island
Bad things might happen so be prepared
What is hope for the best but prepare for the worst
People like to spend time with others who are similar to them
What is Birds of a feather flock together
Things that are offered for free always have a hidden cost
What is There is no such thing as a free lunch