Sometimes being bipolar makes me think no one understands me, and I am alone in the universe. I am alone no longer, SpongeBob Square Pants is also bipolar! Or at least, this is what his creator, Stephen Hillenberg said about the sponge back in 2003.
"Spongebob spends a lot of time laughing and crying. He’s a total bipolar character. Always the extremes. There’s no in between with Spongebob. He’s either completely giddy and ecstatic or so far down in the dumps."