What is cheap heroism?

Cheap Heroism is always easy, and even to sacrifice life is easy to; because it is only a case of hot blood and an overflow of energy, and there is such a longing for what is beautiful! No, take the deed of heroism that is laborious, obscure, without noise or flourish, slandered, in which there is a great deal of sacrifice and not one grain of glory---in which you, a splendid man, are made to look like a scoundrel before every one, though you might be the most honest man in the world---you try that sort of heroism and you'll soon give it up!
--Fyodor Dostoevsky