I've spent five years at the Institute, that I belong to at the present, in Japan. I could not expect it should be so long, when I began to work there. I spent twenty years and better in academia.

Meanwhile, all ones, whom I had trained to make researchers of them, failed to get tenure. Simply no success on education. Probably, they were not so foolish as I do cling to academia. 

In your life, you often need to be foolish enough for making something of yourself. Apostle Paul says in his First epistle to Corinthians 1:18: "For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God." Many young guys who would like to get a professorship in academia come to me and ask, "When can I get a tenure?", or "How can I get a good position?" They are very cautious and wise in the sense of the world to which they belong. But, in academia, nobody knows answers to such the questions. 

Being foolish makes you encouraged to tackle with some important problems before your eyes. It looks like a narrow path to the heavens.