and they were all yellow

While Texas isn't known for its fall foliage, there is this one lovely tree that I walk under every day on the way to work. Last week, this tree exploded into a vibrant bright yellow, and simultaneously dropped half of its yellow leaves onto the ground below. Every day since then, no matter what I may be thinking about ("Am I running late? I hope no one is waiting on me!" "What will I say in this presentation I'm giving today?"), as I walk through the sea of yellow below and gaze at the same bright canopy above, I am overwhelmed by the colors and utterly compelled to smile. There's no choice in this action, and very little thought involved; I simply experience the colors and feel a rush of joy.