What do you mean good as water?

It refers to the highest state of doing good, just like the nature of water, which does not strive for fame and fortune and is favored by all things.

The highest state of goodness, like the nature of water, does not strive for fame and fortune, and treats everything well. Good: the best and the most perfect; Water: it is a kind of humility to avoid heights, a kind of pursuit to the sea, a kind of ability to be both rigid and flexible, a kind of magnanimity to accept rivers, a kind of persistence to drip water and wear out stones, and a kind of persistence to wash dirty lakes. The deceased is like a husband, and life is like a river flowing into the sea. Kindness and giving are unrequited, and indifference to Zhi Ming and modesty is just like water, where water is a metaphor for a saint who does not struggle with the world. Achieving perfection is like being a saint. This sentence can be understood as: water has the virtue of nourishing all things, so that all things have their own benefits, without conflict or conflict with all things, so the greatest goodness in the world is like water.