The longer mathematics lives ...

The longer mathematics lives the more abstract - and therefore, possibly also the more practical - it becomes.
 Eric Temple Bell

Quotes from the same author

In his wretched life of less than twenty-seven years Abel accomplished so much of the highest order that one of the leading mathematicians of the Nineteenth Century could say without exaggeration, "Abel has left mathematicians enough to keep them busy for five hundred years." Asked how he had done all this in the six or seven years of his working life, Abel replied, "By studying the masters, not the pupils.
 Eric Temple Bell
Science makes no pretension to eternal truth or absolute truth.
 Eric Temple Bell