Can it really be measured?

Love, kindness, happiness, and other things which can only be felt but never seen. Usually, people around us ask us HOW MUCH we love them, but my question is, can those things really be measured? Is it like the air, that even though we cannot see it, we can feel it, and measure it? For me, there's only one thing that can measure those things, and I believe that it is only through God's eyes.

Good night!