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: #EFT is the single most effective tool I've learned in 40 years of being a therapist-Dr. Curtis A. Steele (psychiatrist) #stress
This tweet contains emotions: 
joy, optimism