Edward Jenner

The greatest good is to do good to others.

The human heart is a universe unto itself.

We are all connected; to each other, biologically, to the earth, chemically, to the rest of the universe atomically.

The future belongs to those who believe in the beauty of their dreams.

The only way to escape the corruptible effect of praise is to go on working.

The greatest discovery of all time is that a person can change his future by merely changing his attitude.

To see a world in a grain of sand and a heaven in a wild flower, hold infinity in the palm of your hand and eternity in an hour.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

The mind, once stretched by a new idea, never returns to its original dimensions.

Death is not the opposite of life, but a part of it.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

There is more to life than increasing its speed.

The only constant in life is change.

We are here to add what we can to life, not to get what we can from life.

The human spirit is stronger than anything that can happen to it.

It is a fact well known to many, that a disease of the cow, provincially called the Cow Pox, attends the dairymaids in this country, and that they are thereby rendered secure from the infection of the Small Pox.

The more I reflect on the subject, the more I am convinced of the truth of the opinion, that the Cow Pox is a certain preventive of the Small Pox.

It is not my intention to enter into a minute detail of the various opinions which have been entertained respecting the origin of the Small Pox; suffice it to say, that the most generally received is, that it was imported into Europe from the East.

The deviation of the Cow Pox from the Small Pox is so striking, that it cannot fail to attract the attention of the most superficial observer.

The grand object of my inquiry has been to ascertain, whether the Cow Pox is capable of being propagated by inoculation from one human being to another.