4 ideas
17606 | Axioms reveal the underlying assumptions, and reveal relationships between different areas [Kline] |
18201 | General principles can be obvious in mathematics, but bold speculations in empirical science [Parsons,C] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |