This is a lyric from one of Sugarland's songs and it fits so nicely into what your frame of mind is. Read it again. Often times a person will look at an event/situation in their life as a hard time compared to a normal time. However, you also have really good times when things are just clicking. You're at the top of your game. You’re in the zone. That time passes too.
An analogy I was told is to look at the hard times as clouds passing through. Some are big and some are small. When you realize that that is all it is, it becomes easier to handle it and therefore focus on the sunshine just up ahead. It could be a business venture that has hit a bump on its road to success or a relationship area that needs to be worked out. Take it for what it is, a cloud passing through.