"At bottom, the main passion by which he was moved was the passion for justice. He may have hated too strongly, he was jealous, and he was proud. But the mainspring of his life was the desire to take from the shoulders of the people the burden by which it was oppressed. He realized that what, in all varieties of time and place, has caused the downfall of a governing class, has never been some accidental or superficial event. The real cause of revolution is the unworthiness of those who controlled the destinies of a people. Indifference to suffering, selfishness, lack of moral elevation, it was for those defects that he indicted the class from which he sprang. He transformed the fears of the workers into hopes, he translated their effort from interest in political mechanisms to interest in social foundations. He did not trust in the working of laws, he sought always for the spirit that lay behind the order of which they were the expression. He was often wrong, he was rarely generous, he was always bitter; yet when the roll of those to whom the emancipation of the people is due comes to be called, few will have a more honourable, and none a more eminent place."
January 1, 1970
https://en.wikiquote.org/wiki/Karl_Marx