What did dr. martin luther king jr. mean when he said "we cannot turn back"?

What is one method for improving visual layout

How to prevent onions from making you cry chill the onions in the refrigerator for 30 minutes before peeling or chopping them. sulfuric vapors move slower in the cold—think about how garbage smells worse during hot weather. leave the onion root intact until the last possible moment to prevent irritants from escaping into the air. the root contains the largest concentration of sulfuric compounds in an onion. chop or cut the onion with a sharp knife. fast, clean slicing puts less pressure on the onion tissue and minimizes the release of sulfuric compounds. a sharp knife also allows you to expedite your slicing and reduce your exposure to the onion fumes. open a window or light a scented candle close to your chopping station. the hot flame of a candle will attract tear-causing vapor and will reduce the amount of vapor circulating in the air. what can be done to these instructions to make them easier to read at a glance? deleting everything except the first sentences of each numbered step eliminating the numbers and using bullets using illustrations instead of text changing nothing

Which quotation from the passage best supports the themethat humans have a natural desire to learn about theworld? "they were men. i remember the dead man's face.""at least, we make a beginning."and the magic tools are broken—but we can look atthem and wonder."but they were men who built the city, not gods ordemons.