My personal motto is that good deeds is like air to invisible, but necessary. Means good, we may not be visible, but we feel that it is just like the air that I can't see, but know that it exists.
My motto is The weather is like the unseen but necessary. Meaning The good, then we may not see it, but we feel that it exists. It's like the air is invisible, but I know that it exists. And we can not live without it.
My motto is The good is like the air to the invisible but essential meaning, the good, we may not see but we feel that it exists. Just like the air, invisible but know it exists.