The difference is that before you become a scientific socialist your anger is a hot rage, impotent, unharnessed and confused, but when you actually develop a clear understanding of the world and what needs to be done you see that there is hope and little by little you learn to have revolutionary optimism...and while your anger at the injustices of the world never goes away it becomes a constant and calmly simmering driving force that unceasingly motivates you to struggle and make the world a better place, if not for yourself then for future generations. So i say embrace that righteous anger and do your very best to turn it toward something positive, turn it into revolutionary fervor and let it compel you to act, but always act thoughtfully not impulsively.