If this is the best of possible worlds, what then are the others?

It's the possibility of having a dream come true that makes life interesting.

The only impossible journey is the one you never begin.

Free will, though it makes evil possible, is also the only thing that makes possible any love or good or joy worth having.

Do not think that what is hard for you to master is humanly impossible; but if a thing is humanly possible, consider it to be within your reach.

The day will soon come when I will show the world that the transmission of power and speech without the aid of any wires is possible.

There will be obstacles. There will be doubters. There will be mistakes. But with hard work, there are no limits.

The creation of a thousand forests is in one acorn.