Thinking isn't always easy. Feelings get involved, the concepts become unclear, we lose our way about. The purpose of a philosophical investigation, said Wittgenstein, is to give us a clear view of the language, of how we use our words.
In particular, we want to understand how they led us into the contradiction that blocks our way forward. "The civil status of a contradiction," he said, "or its status in civil life: that is the philosophical problem." It is solved by penning a series of philosophical remarks, arranged in a surveyable manner. A "perspicuous presentation," he called it.
William S. Burroughs called it a naked lunch: "that frozen moment when everyone sees what is on the end of every fork."