The purpose of mental activity is to guide action.
當(dāng)一個(gè)問(wèn)題被清晰地陳述時(shí)，它就已經(jīng)解決了一半。
好奇心是所有科學(xué)發(fā)現(xiàn)的驅(qū)動(dòng)力。
The best innovations are often the simplest solutions to the most persistent problems.