Good and Great, Mediocrity.

Good is good enough, sometimes.

Good isn't good enough, othertimes. 

If you have good, but can have great, good isn't enough. 

If you have good, but cannot have great, good is enough. 

The saying says "perfect is the enemy of good". Sometimes you have to accept that something is simply good, not great. Sometimes good is just a stepping stone to great. Sometimes good is all you will get. 

Set expectations accordingly or you will be disappointed. Or you will never do something because it isn't instantly great/perfect. 

Most things do not start out as great. Some thing's don't even start out as good. It's a progression to get there. Learn to trust the process, trust your instincts and usually be patient. 

Good is only acceptable when good is as good as it gets. All other times, good isn't good enough. 

Unless you're okay with mediocre, which is worse than bad and worse than good. Mediocre is a rut that is hard to get out of. It's better to be bad than mediocre oftentimes. Mediocre rarely drives people from that spot. Mediocrity is the land of the dead.