What is analog is a continuum, a flow. Analog is more or less.
What is digital is discrete, a series of particles. Digital is on or off.
Our experience has an analog base, the flow of mental and sensory elements. We digitalize that flow with concepts.
You look around you. Your concepts of the world help you digitalize the flow which you see into buildings, trees, sidewalks, grass, a dog running, students walking to class. As Ulric Neisser says, you visually explore the world around you, guided by your knowledge of it. In this process, the basically analog nature of experience receives digital boundaries that mark things off from one another.
The flow of sound we make when we speak is an analog continuum broken in digital units by the conventions of language. The flow of ink a pen produces as we write is analog, broken into digital units by the distinctions between letters. The conventions of language impose digital boundaries on the analog flow of the medium, whether breath, ink, or electrons.
Normally, our experience is composed of both analog and digital elements. Distinguishing them can help us think about experience, language, and communication.