Intelligence is the wife, imagination is the mistress, memory is the servant.

Intelligence is the wife, imagination is the mistress, memory is the servant.

The mind is not a vessel to be filled but a fire to be kindled.

The mind is not a vessel to be filled but a fire to be kindled.

There are some ideas so wrong that only a very intelligent person could believe in them.

There are some ideas so wrong that only a very intelligent person could believe in them.

Intelligence is the ability to adapt to change.

Intelligence is the ability to adapt to change.

If the human brain were so simple that we could understand it, we would be so simple that we couldn't.

If the human brain were so simple that we could understand it, we would be so simple that we couldn't.

Man becomes man only by his intelligence, but he is man only by his heart.

Man becomes man only by his intelligence, but he is man only by his heart.

Happiness in intelligent people is the rarest thing I know.

Happiness in intelligent people is the rarest thing I know.

Be as smart as you can, but remember that it is always better to be wise than to be smart.

Be as smart as you can, but remember that it is always better to be wise than to be smart.

You have to be smart. The easy days are over.

You have to be smart. The easy days are over.