Determine the valence intensity of the following tweet, considering the mental state of the author. Assign a real number between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Tweet: Good morning chirpy #SpringEquinox and your pensive sister #AutumnEquinox A perfect day however it is expressed 🌹🍁🌓☯️ #theBeautyofBalance
0.688