"To know yet to think that one does not know is the highest [attainment]. Not to know yet to think that one knows is a disease."

"He who talks much is soon exhausted."

"Therefore even the sage treats some things as difficult. That is why in the end no difficulties can get the better of him."

"Therefore it is because the sage never attempts to be great that he succeeds in becoming great."

"The sage does not hoard. The more he helps others, the more he benefits himself."