a conferece

Stella and I went to the APS march meeting. The conference holds every year at march. We went there 7 year ago when we were studying our master degree. This is our first time since 1999. 7 year is really a long time. I tried to recall my feeling in the conference 7 year ago.
In terms of a researcher, I have improved. But in terms of a person, I have got older, and I felt difficult to digest the feeling.
The most valuable thing in the conference was, I met an old friend. We lost communication since we graduated. He came to US right after graduation, and he has just finished his PhD. I understood this as God's "plan", but again, it's not easy to swallow the bitterness. I sensed that he had gone through a tough time. We were good friends in christ, but he no longer goes to church. I was afraid to ask him...