"Low" by whose standards and compared to what? Those who mistake success for happiness usually end up losing both. We recently had a wealthy corporate CFO in these parts who had pretty much everything everybody else wants jump off a bridge because... I don't even know why.
Set your goals such that their ends will be fulfilling to you. Do not set out with success as your end, else it is meaningless. If success only means to accomplish what you have set out to do, then set out to do something worthwhile, that in success you will have achieved something greater than success itself.