The documentary work also provided some crucial lessons on understanding and writing about others' lives.

This emphasis on stepping away from oneself was a crucial lesson for a young writer.

The most crucial lesson of experience is that aid, by itself, achieves nothing.

But there are some crucial lessons that anyone with an invention can learn from this.

Today we remember only the stereotypes about home economics, while forgetting the movement's crucial lessons on healthy eating and cooking.

And from that moment on I decided the crucial lesson was to learn from my mistakes.

The crucial lessons to be learnt from this go beyond a reconstruction of events.

Ron Hunt, another local activist who had worked hard on the case, said the city had learned a crucial lesson.

This early season has been particularly painful for the Mets, but they may have learned a crucial lesson along the way.

This is a crucial lesson of the financial crisis.