“Power, like a desolating pestilence,
Pollutes whate'er it touches; and obedience,
Bane of all genius, virtue, freedom, truth,
Makes slaves of men, and of the human frame,
A mechanized automaton.”

Of course there are exceptions — BUT — very well said as a general overview.

Aren't we, with this quote, just referring to the boys and girls "power" playing? Don't adults direct away from the playing and cultivate knowledge and understanding? And isn't Socialism the vision of social abilities to create?

Sillik, the answer to your questions is NO ! ! ! Your perception of children, adults and the mentally ill is very / VERY  skewed. Knowledge and understanding definitively explains that Socialism is a vision of social abilities to create chaos, poverty, pain, violence, death; AND a loss of personal sovereignty, inalienable rights and liberty at nature's law.

The quote is right on.
Sillik is right off (again).
Socialism is not a 'vision,' it is authoritarian social engineering that does not respect individual ideas or self-determination.  It is arrogance at its core.  Socialism's first task is to kill off everyone that doesn't agree to its 'vision.'  See China, USSR, Cuba, Nazi Germany — all 'socialists' until they have the power, then totalitarian.