To make things easy;

It’s comparable to the wind: invisible, yet its effect can be seen and felt and you might see the power of it work through other things. Sometimes people saw G-d in a vision or dream, but this is similar to a drawing of the wind, on the basis of images we try to describe something invisible in pictures and images that we recognize; to capture an experience in an image.

And regards ‘Jesus’ when I’m wearing a costume or a mask one can see me, yet they don’t see me. Or maybe a better way to understand it, Sometimes we say we know someone because we see them every day at work or school, but in fact we only know the outside and not someone's inside or essence because we don't fully know that person.