To teach how to live without certainty and yet without being paralyzed by hesitation is perhaps the chief thing that philosophy， in our age， can do for those who study it.
The only valid data for psychology are the reports of trained observers.
建筑業(yè)必須進(jìn)化，否則將面臨被淘汰的風(fēng)險(xiǎn)。
"The past is always with us, for it feeds the present."