Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: Theme of week: Ask the Lord for strength &amp; perspective to persevere in #integrity and effort, despite being #disheartened &amp; disappointed.
This tweet contains emotions: 
joy, optimism, sadness