"Ask, and it will be given to you; seek, and you will find; knock, and it will be opened to you." (Matthew 7:7)
"Before they call, I will answer" (Isaiah 65:24)
Sometimes in life, you let go of the best thing that has ever happened to you, only to find it is irreplaceable. If you fail, then you'll just have to live with the closest you can get to the best/perfection. But nothing and no one is ever the same nor holds the same quality of perfection. The happiest people don't necessarily have the best of everything; they just make the best of everything they have.