What is this moment?

How can we know anything if we don't know what this moment is? Isn't it simply a story based on sensations caused by movements? Aren't these sensations also labels attached to an unknown process going on?

Isn't what we call knowing, past or memory just labels on other sensations recorded at other moments?

Isn't the passage of time another sensation with a label of time?

Isn't future a label attached to a certain sensation called expectations?