Many people look to their possessions to give themselves value.
The money in the bank, the nice home, the fancy car, even the clothes they wear. Again, this has nothing to do with personal value. Physical objects do not have the power to convey value, even though everything you have in this world is based upon your personal value.
Others look to their accomplishments.
What they have done, and what they plan on doing in the future. While it is true that everything you accomplish in this world is based upon how you value yourself, the reverse is not true.