Quotes from Konstantin Tsiolkovsky

The Earth is the cradle of humanity, but mankind cannot stay in the cradle forever.

Earth is the cradle of humanity, but one cannot live in a cradle forever.

Men are weak now, and yet they transform the Earth's surface. In millions of years, their might will increase to the extent that they will change the surface of the Earth, its oceans, the atmosphere, and themselves.

All our knowledge - past, present, and future - is nothing compared to what we will never know.

The Earth is the cradle of Humanity. But one doesn't always live in the cradle.

Earth is the cradle of humanity, but one cannot remain in the cradle forever.

Man must at all costs overcome the Earth's gravity and have, in reserve, the space at least of the Solar System.

My entire life consisted of musings, calculations, practical works, and trials. Many questions remain unanswered; many works are incomplete or unpublished. The most important things still lie ahead.

Man will not always stay on Earth; the pursuit of light and space will lead him to penetrate the bounds of the atmosphere, timidly at first, but in the end to conquer the whole of solar space.

All the universe is full of the lives of perfect creatures.

Mankind will not forever remain on Earth but, in the pursuit of light and space, will first timidly emerge from the bounds of the atmosphere and then advance until he has conquered the whole of circumsolar space.

From the moment of using rocket devices, a great new era will begin in astronomy: the epoch of the more intensive study of the firmament.

I do not remember how it got into my head to make the first calculations related to rocket. It seems to me the first seeds were planted by famous fantaseour, J. Verne.

First, inevitably, the idea, the fantasy, the fairy tale. Then, scientific calculation. Ultimately, fulfillment crowns the dream.

A planet is the cradle of mind, but one cannot live in a cradle forever.