Worth comes down to knowing what you bring to the table, knowing your gifts and knowing what you have. It's a person that doesn't have to list off and convince you of who they are, because they already know who they are. It's the person that doesn't have to sing their own praises because they're too busy singing to someone elses, it's the person that doesn't hide behind the "what if" and "maybe" of things.
I believe ability has it's place. It allows us to acknowledge and aim...allows us to consider and be open. Worth is solid...it's a knowing and active using of your gifts and worth. Don't think about jumping....just jump.