“It is not easy to conceive the difficulties we have had.”

Source: What is Property? (1840), Ch. I: "Method Pursued in this Work. The Idea of a Revolution"
Context: To name a thing is easy: the difficulty is to discern it before its appearance. In giving expression to the last stage of an idea, — an idea which permeates all minds, which to-morrow will be proclaimed by another if I fail to announce it to-day, — I can claim no merit save that of priority of utterance. Do we eulogize the man who first perceives the dawn?
Yes: all men believe and repeat that equality of conditions is identical with equality of rights; that property and robbery are synonymous terms; that every social advantage accorded, or rather usurped, in the name of superior talent or service, is iniquity and extortion. All men in their hearts, I say, bear witness to these truths; they need only to be made to understand it.

On the Correct Handling of Contradictions Among the People
Source: (zh-CN) 任何新生事物的成长都是要经过艰难曲折的。在社会主义事业中，要想不经过艰难曲折，不付出极大努力，总是一帆风顺，容易得到成功，这种想法，只是幻想。

Source: The World Peace Diet (2005), Ch. 12
Source: The World Peace Diet: Eating for Spiritual Health and Social Harmony

Source: Crush

Source: Zorba the Greek (1946), Ch. 6

Context: And now we are wanting everyone in every country through the education department of every government to unfold that inner content of life. It’s very simple to light the lamp is so easy. And yet that process of lighting the lamp is enough to eliminate the difficulties in the darkness.