All of humanity's problems stem from man's inability to sit quietly in a room alone.

Humanity is acquiring all the right technology for all the wrong reasons.

The capacity to suffer varies more than anything that I have observed in human nature.

I've learned that you can tell a lot about a person by the way (s)he handles these three things: a rainy day, lost luggage, and tangled Christmas tree lights.

I despise people who depend on these things [heroin and cocaine]. If you really want a mind-altering experience, look at a tree.

That man is the noblest creature may also be inferred from the fact that no other creature has yet contested this claim.

I measure the progress of a community by the degree of progress which women have achieved.

The U.S. Census Bureau acknowledged this fact when it reported that those with a bachelor's degree earn on average $1 million more over their lifetime than those with only a high school diploma.

A narrow mind and a fat head invariably come on the same person.

I just invent, then wait until man comes around to needing what I've invented.

People are more difficult to work with than machines. And when you break a person, he can't be fixed.

You climb to reach the summit, but once there, discover that all roads lead down.

What sunshine is to flowers, smiles are to humanity. These are but trifles, to be sure; but scattered along life's pathway, the good they do is inconceivable.

The first time someone shows you who they are, believe them.

The greatest sweetener of human life is Friendship. To raise this to the highest pitch of enjoyment, is a secret which but few discover.

We are not enemies, but friends. We must not be enemies. Though passion may have strained, it must not break our bonds of affection. The mystic chords of memory will swell when again touched, as surely they will be, by the better angels of our nature.

We need more light about each other. Light creates understanding, understanding creates love, love creates patience, and patience creates unity.

These are people who are capable of devotion, public devotion, to justice. They meant what they said and every day that passes, they mean it more.

Stupid men are often capable of things the clever would not dare to contemplate...

People seldom do what they believe in. They do what is convenient, then repent.

All is in the hands of man. Therefore wash them often.