It is the theory that decides what can be observed.

For me a simple message, to think and act with courage, independence and imagination.

You can't resolve a dilemma with all the very same mind that made it

Each ray of light moves in the coordinate system 'at rest' with the definite, constant velocity V independent of whether this ray of light is emitted by a body at rest or a body in motion.

Academic chairs are many, but wise and noble teachers are few; lecture-rooms are numerous and large, but the number of young people who genuinely thirst after truth and justice is small

Given the millions of billions of Earth-like planets, life elsewhere in the Universe without a doubt, does exist. In the vastness of the Universe we are not alone.

If you've never failed, you've never tried anything new.