How we cite our quotes: (Section.Paragraph)
Quote #4
The bourgeoisie cannot exist without constantly revolutionising the instruments of production, and thereby the relations of production, and with them the whole relations of society. [...] All fixed, fast-frozen relations, with their train of ancient and venerable prejudices and opinions, are swept away, all new-formed ones become antiquated before they can ossify. All that is solid melts into air, all that is holy is profaned, and man is at last compelled to face with sober senses, his real conditions of life, and his relations with his own kind. (Section1.18)
What would the world be like if our traditions and customs encouraged us to relate to each other directly instead of organizing our interactions around money and laws?
Quote #5
[The] work of the proletarians has lost all individual character, and, consequently, all charm for the workman. He becomes an appendage of the machine, and it is only the most simple, most monotonous, and most easily acquired knack, that is required of him. (Section1.31)
Even today, people still value things that are made by hand according to traditional custom. Why might a traditionally handmade good be better than the mass-produced equivalent?
Quote #6
The selfish misconception that induces you to transform eternal laws of nature and of reason, the social forms springing from your present mode of production and form of property—historical relations that rise and disappear in the progress of production—this misconception you share with every ruling class that has preceded you. What you see clearly in the case of ancient property, what you admit in the case of feudal property you are of course forbidden to admit in the case of your own bourgeois form of property. (Section2.37)
Marx seems to be arguing that it's easier to see inequality and oppression in past historical contexts than it is to see it in present society, since in present society things are too familiar.