Carl Sagan

There are worlds within worlds, and worlds beyond worlds.

Science is not only compatible with spirituality; it is a profound source of spirituality.

The universe is not required to be in perfect harmony with human ambition.

The cosmos is all that is, or ever was, or ever will be.

In some respects, science has advanced more in the last century than in the previous two thousand years.

If you wish to make an apple pie from scratch, you must first invent the universe.

The important thing is not to stop questioning.

Imagination will often carry us to worlds that never were. But without it, we go nowhere.

For small creatures such as we, the vastness is bearable only through love.

The universe is a pretty big place. If it's just us, seems like an awful waste of space.