Perhaps we've never been visited by aliens because they have looked upon Earth and decided there's no sign of intelligent life.
The Catholic and the Communist are alike in assuming that an opponent cannot be both honest and intelligent.
If we were to select the most intelligent, imaginative, energetic, and emotionally stable third of mankind, all races would be present.
The intelligent man finds almost everything ridiculous, the sensible man hardly anything.
I much prefer the sharpest criticism of a single intelligent man to the thoughtless approval of the masses.
If this is the only planet on which not only life, but intelligent life, has arisen, that would be very unusual.
Be careful about virtual relationships with artificially intelligent pieces of software.
People just assume, over the years, that soccer players are not too intelligent. As with most assumptions, they're wrong.
I am averse to incompetency. I need mentally stimulating people and intelligent conversations.
I am an intelligent river which has reflected successively all the banks before which it has flowed by meditating only on the images offered by those changing shores.
I'll always be grateful to the public of intelligent amateurs.
A computer would deserve to be called intelligent if it could deceive a human into believing that it was human.
I spent many, many hours with my computer, and it really bugged me that it was very oblivious to my emotional state. And that kind of inspired and motivated me to build an emotionally intelligent computer.
Camels are wonderful animals. Witty, intelligent and sensitive.
When new turns of behavior cease to appear in the life of the individual, its behavior ceases to be intelligent.
He is far too intelligent to become really cerebral.
'The Living And The Dead' is one of those scripts that you read and are instantly compelled and engaged by. It's intelligent, chilling, and engrossing.
To keep every cog and wheel is the first precaution of intelligent tinkering.
War is a way of shattering to pieces... materials which might otherwise be used to make the masses too comfortable and... too intelligent.
Many sophisticated, intelligent people lack wisdom and common sense.