Konstantin Tsiolkovsky Quotes

All that we know is still infinitely less than all that still remains unknown.

The one thing we do not know is the limit of the knowable.

What science cannot discover, mankind cannot know.

The full area of ignorance is not mapped. We are at present only exploring the fringes.

Reality is never more than a first step towards an unknown on the road to which one can never progress very far.

What a big book, captain, might be made with all that is known!" "And what a much bigger book still with all that is not known!

There may be things that are completely unknowable to us, so we must be careful not to treat the limits of our knowledge as sure guides to the limit of what there is.

It is worth starting with visions, though, because they establish hopes and fears. History then determines which prevail.

That knowledge which stops at what it does not know, is the highest knowledge.

I am far too much in doubt about the present, far too perturbed .about the future, to be otherwise than profoundly reverential about the past.

There's no such thing as history, only historians. That's how we know about the past.

I don't think it's meant for man to know everything at once.

It is difficult to discuss... history.. it is more difficult to talk about today.. simple things…

Don't know much about history Don't know much biology.

The last advance of reason is to recognize that it is surpassed by innumerable things; it is feeble if it cannot realize that.

There is nothing new in this world other than the history that you don't know yet.

Nature is all that we think we know plus all that we don't know whether or not we know that we don't know it.

The greatest of all the accomplishments of 20th century science has been the discovery of human ignorance

History is the great propagator of doubt.

If the world is irrational, we can never know it -- either it or its irrationality.

The pictures remind you of something that can never be recaptured, the time is gone, the only thing you know is the present. That's all that's knowable and even the present isn't knowable. The present becomes the past... so you really don't know anything.

We can predict the present without having to know everything about the past.

Hopefully, I write what I don't know.

A lost trail always extends beyond the evidence, and even the trails we find are only fragments of the trails that lie beyond our comprehension.