What this quote means

This quote reveals an essential method in mathematics: the ability to discern, in a particular case, the elements that can be generalized. Often, it is by studying a simple, well-chosen example that one discovers universal principles. This requires observation, intuition, and a certain audacity to abstract. This approach is valid not only in mathematics but also in many areas of life, where solutions to complex problems arise from the careful analysis of a concrete case.

How to apply it daily

Facing a complex problem, isolate a simple case and study it in depth to extract principles that might apply more broadly.