Determine the emotional tone of the following tweet: "When you realize there is #NoHopeForHumanity so you just #start focusing on what's #best for you.". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".
optimism, pessimism, sadness, trust