In an age robbed of religious symbols, going to the shops replaces going to the church. We have a free choice, but at a price. We can win experience, but never achieve innocence. Marx knew that the epic activities of the modern world involve not lance and sword but dry goods.
The modern minds in each generation are the critics who preserve us from a petrifying world, who will not leave us to walk undisturbed in the ways of our fathers.
That ability to take in your surroundings and sort out the important stuff, to be aware, to be vigilant. Then take all that information, put it together, and see if it makes sense to you.