Impressionism' was the name given to a certain form of observation when Monet, not content with using his eyes to see what things were or what they looked like as everybody had done before him, turned his attention to noting what took place on his own retina (as an oculist would test his own vision).
John Singer SargentThe habit of breaking up one's colour to make it brilliant dates from further back than Impressionism - Couture advocates it in a little book called 'Causeries d'Atelier' written about 1860 - it is part of the technique of Impressionism but used for quite a different reason.
John Singer SargentCultivate an ever continuous power of observation. Wherever you are, be always ready to make slight notes of postures, groups and incidents. Store up in the mind... a continuous stream of observations from which to make selections later. Above all things get abroad, see the sunlight and everything that is to be seen.
John Singer Sargent