Nature is full of infinite causes that have never occurred in experience.
The painter who has no doubt about his own ability will attain very little.
He who does not oppose evil......commands it to be done.
Nothing strengthens authority so much as silence.
The wisest and noblest teacher is nature itself.
Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer. Go some distance away because then the work appears smaller and more of it can be taken in at a glance and a lack of harmony and proportion is more readily seen.