I could not think without writing.
What we see changes what we know. What we know changes what we see.
The more we try to improve our schools, the heavier the teaching task becomes; and the better our teaching methods the more difficult they are to apply.
Intelligence is what you use when you don't know what to do.
In genetic epistemology, as in developmental psychology, too, there is never an absolute beginning.
The most developed science remains a continual becoming