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

“If you're watching your competitors, you're unlikely to invent a bunch of stuff on your own.”

“Do not pray for an easy life, pray for the strength to endure a difficult one.”

“A chain is only as strong as its weakest link”

“It always seems impossible until it's done.”

“If past history was all there was to the game, the richest people would be librarians”

“Opportunities come infrequently. When it rains gold, put out the bucket, not the thimble”

“We've had three big ideas at Amazon that we've stuck with for 18 years, and they're the re...”

“When you're at the end of your rope, tie a knot and hold on.”

“Out of your vulnerabilities will come your strength.”

“Habit is the best of all servants, or the worst of all masters.”

“You learn more in failure than you ever do in success”

“The only real mistake is the one from which we learn nothing.”