.this fragile heart of mine.

On first seeing this, I said to myself, how did those cranes even get in there? This picture reminds me of the ships people used to build in bottles.
The message must be something like that your heart has peace in it, but if your heart is even slightly bumped or disturbed, the tranquility will shatter and fall, and your heart will be beyond repair. In other words, there is a delicate balance which keeping peace involves.
The technique used is superb; the lightbulb and the things inside it are very well lit and focussed on. The idea, well, the idea is NOTHING at all like I've seen before, but it is well executed. Frankly, you could have chosen a better shirt (like a plain white one, perhaps), and the hands are a tad distracting. But those are really only minor flaws withing the whole picture, and they don't detract much from the impact.