However, despite centuries of work, the Keepers had never recovered this most precious knowledge of all.

Until he was consumed with the desire to reach down inside his father's mind and extract the precious knowledge.

She had to concentrate on Kaelor, and the precious knowledge hidden inside him.

"Why should I share such precious knowledge with you?"

As a master, I know how precious knowledge is.

"If chance favors your wish to share precious knowledge, my luck is great indeed."

"If that is one of their pieces of precious knowledge, we're as well off without it-" he stopped short.

The plan will share precious knowledge and accelerate medical research.

More precious knowledge is risked when his empire falls, as fall it must.

"The real and precious knowledge is the one that culminates in God fearing."