Experience teaches only the teachable.

The only source of knowledge is experience.

Experiment is the sole source of truth. It alone can teach us something new; it alone can give us certainty.

Experiment is the only means of knowledge at our disposal. Everything else is poetry, imagination.

The solitary creator, dreaming his or her dream, unaided, seems to me to be the only artist we can trust.

Certitude belongs exclusively to those who only own one encyclopedia.

Self-education is, I firmly believe, the only kind of education there is.

Self-education is, I firmly believe, the only kind of education there is.

The best teacher is experience and not through someone's distorted point of view

Tu se' lo mio maestro e 'l mio autore,
tu se' solo colui da cu' io tolsi
lo bello stilo che m'ha fatto onore.

There is only one school: that of talent.

In the end one experiences only oneself.

No teacher is greater than one’s own experience.

Death is the only teacher in evolution