self-worth

 often depends senselessly on the thoughts in someone else's head.

Why should the way I feel depend on the thoughts in someone else's head'

is often wrongly felt by virtue of having money. Such people think they are worth a lot of money because they have it.

Some people think they are worth a lot of money because they have it.

is a thing one would do well to over-estimate if one is to accomplish all that is demanded of one.

If you are to accomplish all that one demands of you, you must overestimate your own worth.

self worth, n.Definitions