According how much that fear controls you. For instance if you have kids you can not master the fear of losing them. But yes you can overcome some fears just by facing them, no matter how freighting facing them anyway. By facing that fear won't necessarily overcome it, but give you the strength to overcome it. For instance if you have a fear of spiders find the most deadly one, a daddy longlegs they have a bite that can kill an elephant, but their mouths are too small to penetrate you skin. Pick one up or observe it just to become less overwhelmed he can't hut you, but maybe he can help you become less afraid.