Evaluate the valence intensity of the following tweet, considering the mood of the tweeter. Provide a score between 0 and 1, where 0 indicates very negative and 1 indicates very positive.
Tweet: I'm strong 'cause I'm weak\nI'm beautiful 'cause I know my flaws\nI'm fearless 'cause I've been afraid\nI can laugh 'cause I've known sadness..
0.500