Our son stood up and left us.We watched as he got up from his seat，walked past us slowly，and joined the other young boys and girls walking towards the children’s classroom.His face showed a mix of fear and excitement，and he stayed close to his sister as he moved down the aisle.

　　My wife and I sat together，alone there for the first time.I began to feel sad，a longing for something I couldn’t describe well.I glanced at my wife.A tear rolled down her cheek.She was feeling the same thing.I slid over，and we held hands.Our last child was entering the first grade，and we felt part of him slipping away.He’d be in school for a full day now.He’d be more independent，and need us less often.And，he’d never again be the toddler he once was.

　　In our “stay positive” culture，many parents only see these times as a reason to celebrate.They see it as an inevitable change，and prepare themselves for the next challenge.But I couldn’t help feeling this.I didn’t want to bury my feeling of sadness.Those who protect themselves from these moments lose a great opportunity of growth.It is the kind of growth that results from pain，and makes us all more a part of the human family

　　Half an hour later，my son returned to us，his eyes twinkling.He was excited to tell us about his new experience.We listened to him，and his smiling face helped to ease the sadness.In fact，it was impossible not to feel happy for him.

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