This idiom made a frame in my mind as I was reading the captivity of the Jews in Egypt. In the contemporary world the Jews became enslaved and made captive by the mad Hitler. The Jews are races who are travelers in the Wilderness. Traveler in the Wilderness as an Idiom means someone who is plagued by earthly troubles and sorrows. Oh God Jehovah Jesus make my victory while I am a traveler in the Wilderness.
When Moses and the Israelites were fleeing from the Pharaoh after the Pharaoh letting them go, the pharaoh became hardhearted and sent his army after them. Then people of Israel grumbled: it would have been better for us to be slaves in Egypt rather than Corpses in the Wilderness. Slaves in Egypt and Corpses in the Wilderness are an idiom meaning choosing an alternative that is difficult and tiresome but something which will read rich dividends in the end.