Animals have no doubts because they have no minds (ego). A cat does what a cat is supposed to do without any judgments or considerations. It chases a mouse and if unsuccessful it pursues another option to feed itself. Have you ever seen a cat, or any other animal for that matter, to put its paw on its head saying "you're such a bad cat because you couldn't even catch a mouse?"
“There is a law in psychology that if you form a picture in your mind of what you would like to be, and you keep and hold that picture there long enough, you will soon become exactly as you have been thinking.”
Many consider William James the father of modern psychology. He fully understood the power of human mind and creative visualization. The fact is that we become what we think about all day long! So, what are you thinking about most of the time? How do you see yourself in your mind’s eye? Do you see yourself as one who has unlimited potential capable of achieving any objective or a victim of circumstances? Do you believe that life events create your reality or do you use the events as stepping stones toward accomplishing your goals?