To reach a goal you have never before attained, you must do things you have never before done.
Just when all seems to be going right, challenges often come in multiple doses applied simultaneously. When those trials are not consequences of your disobedience, they are evidence that the Lord feels you are prepared to grow more. He therefore gives you experiences that stimulate growth, understanding, and compassion which polish you for your everylasting benefit.
You have times when you are extremely happy, times of testing, and times of trial, but the Lord guides you through all of those growth experiences together.