The great trouble is that the preachers get the children from six to seven years of age and then it is almost impossible to do anything with them.

Because I readily absorb ideas from every source - frequently starting where the last person left off - I never pick up an item without thinking of how I might improve it.

Direct thought is not an attribute of feminity. In this, women are now centuries behind man.

The dove is my emblem.

The doctor of the future will give no medicine, but will involve the patient in the proper use of food, fresh air and exercise

Invention is 10% inspiration and 90% perspiration.

When there's no experimenting there's no progress. Stop experimenting and you go backward. If anything goes wrong, experiment until you get to the very bottom of the trouble.