Once there was a songbird. Someone approached her mid-song and told her, "Your singing is horrible, you are ugly and little, offering nothing to the world. No one likes you, so stop now or else!"
The bird looked down upon the other and said, "I don't care how you feel. I'm a songbird. I sing. It's what I do." And continued singing.
Another approached her mid-song and told her, "Your singing is beautiful, you are gorgeous and larger-than-life, a gift to us all. Everyone loves you, please keep going, for all our sakes!"
The bird looked down upon this next interruption and said, "I don't care how you feel. I'm a songbird. I sing. It's what I do." And continued singing.