The ancient sage who concocted the maxim, Know Thyself might have added, Don't Tell Anyone!

The deadliest foe to virtue would be complete self-knowledge.

The one self-knowledge worth having is to know one's own mind.

Knowledge has to be improved, challenged, and increased constantly, or it vanishes.

Adam knew Eve his wife and she conceived. It is a pity that this is still the only knowledge of their wives at which some men seem to arrive.

The known is finite, the unknown infinite; intellectually we stand on an islet in the midst of in illimitable ocean of inexplicability. Our business in every generation is to reclaim a little more land.