Do You Fret Because of Evil?

In a world full of sin and injustice, it is easy to fall into worry, to wonder what will happen, to be distressed over the seeming success of the wicked and ruin of the righteous. Why does God seem to ignore injustice? Why do those who cheat and lie seem to never get caught? Why do the good suffer while the bad get away Scott-free? Questions like these can cause one to fret and lead to other questions like: does God care? Is He really good? Is He really in control?