They must often change, who would be constant in happiness or wisdom.

Progress is impossible without change, and those who cannot change their minds cannot change anything.

Human nature will not change. In any future great national trial, compared with the men of this, we shall have as weak and as strong, as silly and as wise, as bad and as good.

The greatest revolution of our generation is the discovery that human beings, by changing the inner attitudes of their minds, can change the outer aspects of their lives.

He who has so little knowledge of human natures as to seek happiness by changing anything but his own disposition will waste his life in fruitless efforts.

The very key to our success has been our ability, foremost among nations, to preserve our lasting values by making change work for us rather than against us.

What is conservatism? Is it not adherence to the old and tried, against the new and untried?

I shall work for the Republican party and call on all women to join me, precisely…for what that party has done and promises to do for women, nothing more, nothing less.

The world hates change, yet it is the only thing that has brought progress.

The need for change bulldozed a road down the center of my mind.

If you have health, you probably will be happy, and if you have health and happiness, you have all the wealth you need, even if it is not all you want.

A kind heart is a fountain of gladness, making everything in its vicinity freshen into smiles.

Rest, nature, books, music, such is my idea of happiness.

It isn't what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.

Every heart that has beat strong and cheerfully has left a hopeful impulse behind it in the world, and bettered the tradition of mankind.

Cherish all your happy moments; they make a fine cushion for old age.

A really great talent finds its happiness in execution.

What can be added to the happiness of a man who is in health, out of debt, and has a clear conscience?

Seek not, my soul, the life of the immortals; but enjoy to the full resources that are within thy reach.

I hope our wisdom will grow with our power, and teach us, that the less we use our power the greater it will be.

Calmness of mind is one of the beautiful jewels of wisdom.

In life, all good things come hard, but wisdom is the hardest to come by.

I was wise enough to never grow up while fooling most people into believing I had.

The opinion of 10,000 men is of no value if none of them know anything about the subject.

First, have a definite, clear practical ideal; a goal, an objective. Second, have the necessary means to achieve your ends; wisdom, money, materials, and methods. Third, adjust all your means to that end.

To be a philosopher is not merely to have subtle thoughts, nor even to found a school, but so to love wisdom as to live accordingly to its dictates, a life of simplicity, independence, magnanimity, and trust.