Mastering needs to be employed !!!!

David and Jack joined a wholesale company together just after graduation. Both worked very hard.
After several years, the boss promoted Jack to sales executive but David remained a sales rep. One day David could not take it anymore, tender resignation to the boss and complained the boss did not value hard working staff, but only promoted those who flattered him.

The boss knew that David worked very hard for the years, but in order to help David realize the difference between him and Jack, the boss asked David to do the following. Go and find out anyone selling water melon in the market? David returned and said yes. The boss asked how much per kg? David went back to the market to ask and returned to inform boss the $12 per kg.
Boss told David, I will ask Jack the same question? Jack went, returned and said, boss, only one person selling water melon. $12 per kg, $100 for 10 kg, he has inventory of 340 melons. On the table 58 melons, every melon weighs about 15 kg, bought from the South two days ago, they are fresh and red, good quality.
David was very impressed and realized the difference between himself and Jack. He decided not to resign but to learn from Jack.
My dear friends, a more successful person is more observant, think more and understand in depth. For the same matter, a more successful person sees several years ahead, while you see only tomorrow. The difference between a year and a day is 365 times, how could you win?