Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: Only God knows why things happen, sometimes it's just hard to understand. #sad #prayingforyou
This tweet contains emotions: 
optimism, sadness