Socialism is a cult religion
Capitalism is an economic system. Under capitalism, most of the means of production are owned by people who must make their living by selling the things they produce at prices that cover their costs. You can see capitalism in operation anywhere living standards have been rising.
Socialism is a form of parasitism. It bleeds productivity with its hunger for revenge against the successful and envy of what others have achieved that they cannot achieve themselves.
A socialist would rather be poor than that others should be rich. If socialists are to become rich themselves, they will never do it by producing something and creating value, but by finding their way into a position of political power that allows them to syphon off the wealth created by others.