Useless?

I was reading 蔡康永's blog today, and he was writing how his parents never really asked "這有什麼用？" while he was growing up.....and what he wrote at the end of the blog was inspiring...Here is the last part of the blog....

我的成長，讓我相信 : 人生最重要的東西，其實大都沒有什麼用:
　　
愛情，正義，自由，尊嚴，知識，文明，

這些一再在灰黯時刻拯救我，安慰我的力量，對很多人來講〞沒有用〞，

我卻堅持相信，這些才都是人生的珍寶，才經得起反覆的追求。

人生，並不是拿來用的。

I wonder if we are trying to pursue some "useless" things which really would make some difference in our lives and lives around us?