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

To set foot on the soil of the asteroids, to lift by hand a rock from the Moon, to observe Mars from a distance of several tens of kilometers, to land on its satellite or even on its surface, what can be more fantastic? From the moment of using rocket devices a new great era will begin in astronomy: the epoch of the more intensive study of the firmament.

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

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

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

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

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