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There is no contradiction in the statement that we have to trust our senses, and that we have to develop them to make them trustworthy. For, 'nature speaks upwards to the known senses of man, downwards to unknown senses of his'. Goethe's path was aimed at wakening faculties, both perceptual and conceptual, which lay dormant in himself. His experience showed him that 'every process in nature, rightly observed, wakens in us a new organ of cognition'. Right observation, in this respect, consisted in a form of contemplating nature which he called a 're-creating (creating in the wake) of an ever-creative nature' (Nachschaffen einer immer schaffenden Natur).

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This falling back from the stage of an organ of fertilization to that of a petal shows that the plant is capable of regressive metamorphosis, and we may conclude from this that in the normal sequence the different organs are transformed from one another by way of progressive metamorphosis. It is evident that the regressive type occurs only as an abnormality, or as a result of artificial cultivation. Plants once brought into this condition frequently show a general state of unrest, so that other organs also are inclined to fall back to a lower level. Thus we may come across a rose, an outer petal of which appears in the form of a leaf of the calyx (sepal), or one of the sepals is found to have grown into an ordinary rose leaf.

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In other ways, too, the plant shows its capacity to act as a whole at various places of its organism. Otherwise, no plant could be propagated by cuttings; in any little twig cut from a parent plant, all the manifold forces operative in the gathering, transmuting, forming of matter, that are necessary for the production of root, leaf, flower, fruit, etc., are potentially present, ready to leap into action provided we give it suitable outer conditions. Other plants, such as gloxinia and begonia, are known to have the power of bringing forth a new, complete plant from each of their leaves. From a small cut applied to a vein in a leaf, which is then embedded in earth, a root will soon be seen springing downward, and a stalk with leaves rising upward.

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From the concept of the ur-plant Goethe soon learned to develop another concept which was to express the spiritual principle working in a particular plant species, just as the ur-plant was the spiritual principle covering the plant kingdom as a whole. He called it the type. In the manifold types which are thus seen active in the plant world we meet offsprings, as it were, of the mother, the 'ur-plant', which in them assumes differentiated modes of action.

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Without pollination there is no ripening of the seed. Ripening means for the seed its acquisition of the power to bring forth a new and independent plant organism through which the species continues its existence within nature. In the life cycle of the plant this event takes place after the organism has reached its highest degree of physical perfection. When we now read these facts in the light of the knowledge that they are deeds of the activity of the type, we may describe them as follows:

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An essay, written by Goethe about the same time as the one just quoted, shows how he came to think at a later date about the raising of human perception into the realm of ideas. In this essay, entitled Discovery of an Excellent Predecessor,9 Goethe comments on certain views of the botanist, K. F. Wolff, regarding the relationships between the different plant organs, which seemed to be similar to his own, and at which Wolff had arrived in his own way.

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7 The following observation is not one made by Goethe himself. It is presented here by the author as an example of the heuristic value of Goethe's method of pictorial-dynamic contemplation of the sense-world.

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We should do Goethe an injustice if we measured the value of his scientific work by the amount of factual knowledge he contributed to one or other sphere of research. Although Goethe did bring many new things to light, as has been duly recognized in the scientific fields concerned, it cannot be gainsaid that other scientists in his own day, working along the usual lines, far exceeded his total of discoveries. Nor can it be denied that, as critics have pointed out, he occasionally went astray in reporting his observations. These things, however, do not determine the value or otherwise of his scientific labours. His work draws its significance not so much from the 'what', to use a Goethean expression, as from the 'how' of his observations, that is, from his way of investigating nature. Having once developed this method in the field of plant observation, Goethe was able, with its aid, to establish a new view of animal nature, to lay the basis for a new meteorology, and, by creating his theory of light and colour, to provide a model for a research in the field of physics, free from onlooker-restrictions.

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We now extend our mental exercise to the plant's whole organism. By a similar mental effort as applied to the leaf-formations we strive to build up a complete plant. We start with the seed, from which we first imagine the cotyledons unfolding, letting this be followed by the gradual development of the entire green part of the plant, its stem and leaves, until the final leaves change into the sepals of the calyx. These again we turn into the petals of the flower, until via pistil and stamens the fruit and seed are formed.

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A particular observation made by Goethe in this respect is of interest for methodological reasons. In the introduction to his treatise Metamorphosis of Plants, when referring to the regressive metamorphosis of stamens into petals as an example of an irregular metamorphosis, he remarks that 'experiences of this kind of metamorphosis will enable us to disclose what is hidden from us in the regular way of development, and to see clearly and visibly what we should otherwise only be able to infer'. In this remark Goethe expresses a truth that is valid in many spheres of life, both human and natural. It is frequently a pathological aberration in an organic entity that allows us to see in physical appearance things that do not come outwardly to the fore in the more balanced condition of normal development, although they are equally part of the regular organic process.