You can't get upset that people don't choose you to do certain things because you complain all the time. Every time you complain about your job and how you're ready to leave, you are denying yourself an opportunity to grow and gain more experience. This is not just a physical principle, it is a spiritual principle as well. Your complaints about a job, spouse, boss, family, and life that other people would love to have is an insult to God Who blessed you with them. Be careful how and when you express your frustration, you could be setting up your own fall. God bless!
