阅读短文，根据其内容回答问题。

Self-images are our own mind’s pictures of ourselves. These images（意象）include the way we look, the way we act, the way we talk and the way we think. When we find that believing in ourselves is a bit hard, it is time we build positive（积极的）self-images and learn to have happy lives.

 Interestingly, our self-images are often quite different from the images others hold about us. Unluckily, most of these images are more negative（消极的）than they should be. Thus changing the way we think about ourselves is the key to change our self-images and our whole world.

The best way to destroy a passive（被动的）self-image is to step back and decide to pay attention to our successes. That is, make a list if we need to, but write down all of the great things we do every day. Don’t allow doubts to happen on us.

It very well might be that we are experiencing negative self-images because we can’t move past the weakness that we see about ourselves. Well, make a change of it as our primary tasks. If we think we’re silly because we aren’t good at math, find someone to help us. If we think we’re weak because we can’t run a mile, get more practice. But remember, what we think doesn’t mean it’s true.

The best way to get rid of a negative self-image is to realize that our images are far from the goals, and to actively make ourselves believe that we have positive personalities. Changing the way we think and working on those we need to improve will go a long way to create new positive self-images. When we can pat ourselves on the back, we’ll know we’re well on our way.

64. What are self-images?

65. When do we need to build positive self-images?

66. What’s the key to change our self-images?

67. How can we destroy passive self-images?

68. What does the writer mainly want to tell us?