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: Sometimes it takes #sadness to know happiness, #noise to appreciate #silence and absence to value presence.
This tweet contains emotions: 
anticipation, joy, optimism, sadness