宵旰
词典getting up before dawn and eating late ——busy with state affairs
词典labor incessantly on duty：宵旰。
1. 宵旰的意思
1. 人须常宵旰勉行，以认识这个世界，以期免受此世摧残，更有效率地去构筑这个世界，以使子孙得免於饥饿、恐惧所苦。
They have struggled constantly to understand the world, to protect themselves from its ravages, to organize it more effectively, and to make it a place in which their children might live without hunger or fear.