Real knowledge is to know the extent of one's ignorance.
Related tags: know, ignorance,
Quiet people have the loudest minds.
Related tags: quiet, people, loud, mind,
I was bold in the pursuit of knowledge, never fearing to follow truth and reason to whatever results they led.
Related tags: bold, pursue, know, never, fear, truth, reason, whatever, results,
Read the best books first, or you may not have a chance to read them at all.
Related tags: read, best, book, chance, at all,