Every one is a historical allusion Spring and Autumn Period. Literally it means to say: do not blow yu of people mix up the numbers in the blow yu ranks. Metaphor no genuine talent mixed in among the insiders, shoddy. This story tells us: only study hard, learned a real ability to withstand all difficulties, setbacks and trials.
The same person as long as we do not make a good impression at work, they will not experience a midlife crisis, even if there can easily deal with.
But in reality there are a lot of people working in every one, they always look for opportunities to work to catch fish, accustomed to living in a comfort zone do not make progress,