If every time I make the right choice morally, I succeed in this world, and every time I make the wrong choice morally, I fail in this world, then I no longer have free will, I am merely a rat in a Skinner maze being conditioned to press the correct lever. This means that even if I am righteous I may suffer, and I may suffer at the hands of the evildoers. Healer of all flesh and Doer of wonders. This blessing praises G-d for administering our body functions and maintaining our health. If but one were ruptured, or but one were blocked, it would be impossible to remain alive and stand before You, Hashem.
Most people fall within one category while some are a mixture of two or more.
Water as the origin of your soul means fruitfulness, purity and health. It means you don't get angry quickly, or at least you calm down quickly. Any negative issues related to water can be mended by observance of the Torah, which is compared to water. This is a highly complicated subject, which can't be conveyed properly via this media. If the Torah is carried past you, it is a mitzvah to follow behind it until it is brought to rest.