Quote by Charles Spearman

"Intelligence is not a single, unitary ability, but rather a general factor that influences performance across diverse cognitive tasks."

"The human mind possesses a general cognitive ability that affects success in all intellectual endeavors."

"Education should aim to develop the general factor of intelligence that underlies all mental abilities."

"Correlation analysis reveals the hidden structures of human thought and ability."

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."