When making friends, falling in love, or doing business, it's best to associate only with kind people. People who constantly surround you, flatter you, and rely on you aren't necessarily good people, nor are they worthy of friendship or trust. Kindness often leads to disadvantages. This is because it tends to be empathetic, understanding, and forgiving, while most people are shrewd. Only when kindness meets kindness can a positive chemical reaction occur, leading to more and more good things. It's difficult to change your personality, but you can purify your social circle.