The world is so constructed that if you wish to enjoy its pleasures, you must also endure its pains. Like it or not, you cannot have one without the other. It is about the law of opposites, of balance. Success is not measured by what you accomplish. It's measured by the opposition you encounter and the courage with which you shift your struggle against the odds. You'll find some things are difficult before they are easy. The greater your obstacles, the more glory in overcoming them. So, make up your mind before you start that challenge is part of the package.
Challenge = Growth!