The answer may be one you cannot accept. You can't.

IOW, there is no such thing as absolute knowledge. You can never be SURE about what you "know", because you never know what you may not know. Unless you know EVERYTHING, you can't absolutely know anything.

Knowing is just a more sure form of believing. It is a continuum - hope-believe-know.

When you hope, you wish for something to be true. You open yourself to the possibility that it may be. You entertain it.

When you believe something, you are quite sure it is true. But you have doubt. If evidence to the contrary appears, you will abandon the belief.

When you know something, you are very sure it is true. If evidence to the contrary appears, you will doubt the evidence. You will judge not by appearances, because you KNOW.

Hope may become belief may become knowledge. Knowledge may become belief may become hope.

For some, seeing is believing (knowing). I see a blue box on my desk. I say "I know there is a blue box on my desk." Yet later I discover a holographic projector on the ceiling. It turns out there never was a blue box on my desk - there was only an illusion. I thought I knew, but because there was that which I did not know, now I know differently.

Belief and knowledge tend to close the mind. (If evidence to the contrary appears, you will doubt the evidence. You will judge not by appearances, because you KNOW.) Faith is the opposite. It is UNknowing. It is opening the mind to what may be, releasing preconceptions.

Thus (using these definitions) science excels through faith. Scientists have faith, in that they open their eyes, forget what they 'know', and observe what is. They walk into the darkness, unknowing, to find the light. From this, belief and knowledge forms - scientific knowledge. Even this is not absolute.

It gets even more complicated, because what you find in that darkness is not merely found, but created. Life is not a process of discovery. As quantum physicists are discovering, life is a process of creation. The version of the quantum soup (all possibilities) which you experience as "reality" depends upon... your BELIEFS.

Thus, beliefs/knowledge (what you "know") creates your experience. Your experience confirms and reinforces your beliefs/knowledge. It can be a vicious cycle, or a sublime one, depending on the beliefs. This is why people get locked in belief, knowledge, and denial.

The way out of the cycle is to create belief based not on what is observed outwardly, but on what you choose - so-called 'pure creation'. Arbitrary choice. You become the creator as well as the created. Hence God's famous statement: I am that I am.

This is when you begin to perceive the illusion, the maya, as illusion, and become master of it. That is why and how Jesus and many others perform miracles. Their experience is created from pure choice. For them, the cycle of belief and experience is sublime. Yet nothing is not a miracle - we all create experience. What we call a "miracle" is merely a creation experience which differs from what we consider normal.