58) _What think ye?_ _The seed_ that ye emit. 59) _Do ye_ create the same or are we the creators thereof? 60) We have decreed death unto you all, and we shall not be prevented. 61) We are able to substitute others like you in your stead, and to produce you again in the condition or form which ye know not. 62) Ye know the original production by creation; will ye not therefore consider.… 63) _What think ye_ the grain which ye sow? 64) _Do ye_ cause the same to spring forth, or _do we_ cause it to spring forth? 65) _If we pleased, we could render_ the same dry and fruitless, so that you would not cease to wonder, saying, 66) Verily we have contracted debts for seed and labour, but we are not permitted to reap the fruit thereof. 67) _What think ye?_ The _water_ which ye drink, 68) _Do ye_ send down the same from the clouds, _or are we_ the senders thereof? 69) _If we pleased we could_ render the same brackish: will ye not therefore give thanks? 70) _What think ye?_ The _fire_ which ye strike, 71) _Do ye_ produce the tree whence ye obtain the same, _or are we_ the producers thereof? 72) _We have ordained_ the same for an admonition, and an advantage to those who travel through the deserts. This passage, which is complete in itself, consists of four stanzas, of 5-4-3-2 verses, all of them diverse presentations of the same idea and alike in construction. The whole group is enclosed between two single verses which correspond to one another, and form, as it were, a frame to it. An exact observation of the _Koran_ shows that strophes of the most varied structure occur in it, often combined with the responsion, and held together by all kinds of other literary forms. The principal characteristic of the strophe is still unity of idea, which, being in its nature relative, is subject to great variation. Nor is the strophe the final and greatest unit. As the strophe is formed by the combination of several lines or sentences, so a group is formed of a number of strophes and a great systematically constructed discourse of several groups. The same laws which govern the sentence and the verse prevail in the structure of the strophe and the formation of the group. Parallelism and antithesis are the principal elements of form in sentence and verse; they are likewise the forces that struggle for expression, and assert themselves in the structure of the strophe and the formation of the group.