“ Don't be afraid of enemies who attack you. Be afraid of the friends who flatter you. ”
Source: How to Win Friends and Influence People
Many people will walk in and out of your life, but only true friends will leave footprints in your heart
Don't waste your time with explanations: people only hear what they want to hear.
The best index to a person's character is how he treats people who can't do him any good, and how he treats people who can't fight back.