Forms
- Bithynia tentaculata f. codia
- Bithynia tentaculata f. excavata
- Bithynia tentaculata f. gigas
- Bithynia tentaculata f. producta
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“Our normal waking consciousness, rational consciousness as we call it, is but one special type of consciousness, whilst all about it, parted from it by the filmiest of screens, there lie potential forms of consciousness entirely different.”
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“Every man, in his own opinion, forms an exception to the ordinary rules of morality.”
—William Hazlitt (1778–1830)
“I would urge that the yeast of education is the idea of excellence, and the idea of excellence comprises as many forms as there are individuals, each of whom develops his own image of excellence. The school must have as one of its principal functions the nurturing of images of excellence.”
—Jerome S. Bruner (20th century)