Still, the idea of debt as a tradable investment endured.

Although the proposal was rejected as being too risky and unproven, the idea of solar-sail-propelled spacecraft has endured.

The idea that all political and social events are but the result of given economic conditions and can be explained by them cannot endure careful consideration.

This idea has endured throughout the history of Protestantism.

Despite enormous advances in technology, from optical fibers to cellular telephones, the underlying idea of the closed-loop circuit has endured.

These musical ideas endured a lifetime, as strong as the articles of Christian faith that ruled his thoughts.

The idea of a systems approach has endured well.

The final test of whether the $157 million has been well invested, educators say, will be whether the new ideas endure.

This is perhaps part of the reason that the idea has endured since its conception in the 1970s.

Even my books may not last, but the ideas will endure.