We especially need imagination in science. It is not all mathematics, nor all logic, but it is somewhat beauty and poetry.

There is no cosmetic for beauty like happiness.

It is sad to see a woman sacrificing the ties of the affections even to do good.

We have a hunger of the mind which asks for knowledge of all around us, and the more we gain, the more is our desire; the more we see, the more we are capable of seeing.

That knowledge which is popular is not scientific.

I was a little doubtful about the propriety of going to the Mammoth Cave without a gentleman escort, but if two ladies travel alone they must have the courage of men.

We travel to learn; and I have never been in any country where they did not do something better than we do it, think some thoughts better than we think, catch some inspiration from heights above our own.

I am just learning to notice the different colors of the stars, and already begin to have a new enjoyment.

The world of learning is so broad, and the human soul is so limited in power!

We especially need imagination in science.