And they said one man to another "Let us put up a head and turn to Egypt" What is the meaning of "let us put up a head"? Rashi explains it as desire to appoint a leader that will lead them back to Egypt. Ha'amek Davar explains it differently. Each person wanted to remain free and independent, something they believed was antithetical to life in in the land of Israel where they would be totally subject to God's will. The Talmud understands the phrase as a longing for idolatry.  Indeed, to refuse to pick oneself up and move along, always thinking the past was somehow better is to lack faith in God: The Lord is my shepherd, I shall not want.