It's important to maintain good relationships with your friends, but it's equally important to understand your enemies.
"He always watches his competitors carefully because he believes in keeping your friends close and your enemies closer."
to suddenly become very angry or lose control
Everyone must work together or help with a task.
to learn how to do a particular job or activity
to stop talking or thinking about something stressful
to cause pollution or environmental impact through daily act...
to buy something at a low price; to make a bargain