Parable of a well

"Once there was a deep well of water. Above it hung a pulley, with a rope over the pulley. At the extreme ends of the rope were two buckets. Water was drawn from the well by pulling the rope down. a full bucket would rise while an empty bucket would go down to be replenished. Those who used the well didn't realize that as the buckets passed they would talk to each other. One bucket was an inveterate pessimist. He was convinced that everything went wrong in his life. Whenever he passed his friend, he would recount what he considered to be deplorable circumstances in his life. His comments would include complaints such as: 'I hate being in a cold, dark, wet hole all my life. I work very hard, but no matter how many times I give water to others, they never thank me for it. It's discouraging. The worst part is that I am not succeeding. No matter how many times I come up full I always go down empty.'
"The other bucket was a classic optimist. Every time he would pass, he would try to lift his neighbor with his enthusiasm: 'I wish I could share the beauty of my life with you. I am so happy. When I feel myself rising I wonder, 'Will there be sunlight, or will there be glistening stars? Will it be that young boy who takes water for the garden of his mother, or the little girl who helps the mother make bread?' I love to come up because I can always help someone else. They don't know that I can talk, so they thank me with their eyes. My life is so worthwhile. The best part is, no matter how many times I go down empty, I always com up full.'"
Scott, Richard G. Finding Peace, Happiness and Joy. Deseret Book, Salt Lake City, 2007

Which bucket are we? How do we see life? Pessimistically or optimistically? What is our perspective?