What song is the Kid Cudi quote Dream as if you'll live forever live as if you'll die today from?

The quote "Dream as if you'll live forever, live as if you'll die today" is from Kid Cudi's song "The Prayer." This track is featured on his debut album, "Man on the Moon: The End of Day," released in 2009. The lyrics reflect themes of ambition, mindfulness, and living in the moment.