如果用心一旦松散，那么万事都做不好。如果用心一旦粗疏，那么凡事不能聚精会神。用心一旦固执，凡事就不能见其本来面目。
Persistence in research is key; nature reveals its secrets only to those who are patient.
The only real voyage of discovery consists not in seeking new landscapes, but in having new eyes.
The essence of modernity is psychologism, the experiencing and interpretation of the world in terms of the reactions of our inner life and indeed as an inwardness.