Fichte thus transformed the transcendental idealism of Kant by identifying the thing with the object, and by interpreting noumenon, not in Kant's sense of something which speculative reason conceives and practical reason postulates to exist in accordance with the idea, but in the new meaning of a thought, a product of reason.
A third way to predict the future that I believe is reliable rejects both the slavish following of the straight line and the purely speculative approach.
It is no more than characteristic of Kant's whole speculative philosophy that he should' think the Ontological argument the one which comes nearest to st,-cess (yet the Ontological argument is held to prove - or rather to point out - not that God must exist, but that we think of him as necessary if we think of him as existing at all).
With its character largely determined by Jewish elements, and even more by contact with the dogmas of Christianity, this second Alexandrian school resulted in the speculative philosophy of the Neo-Platonists and the religious philosophy of the Gnostics and early church fathers.
On the speculative side, Ramanuja also met Sankara's strictly monistic theory by another recognizing Vishnu as identical with Brahma as the Supreme Spirit animating the material world as well as the individual souls which have become estranged from God through unbelief, and can only attain again conscious union with him through devotion or love (bhakti).
Zoroaster's teachings show him to have been a man of a highly speculative turn, faithful, however, with all his originality, to the Iranian national character.
The leader in speculative philosophy is Immanuel Kant, though he includes many agnostic elements, and draws the inference (which some things in the letter of Butler might seem to warrant) that the essence of Christianity is an ethical theism.
The high cost of coal, the speculative attractions of mining, and the high wages of labour, handicapped the development of manufactures in early years.
But the chief value of Lucretius as a thinker lies in his firm grasp of speculative ideas, and in his application of them to the interpretation of human life and nature.
An even more complete and minutely detailed view of the sacrificial system is no doubt obtained from the ceremonial manuals, the Kalpa-sutras; but it is just by the speculative discussions of the Brahmanasthe mystic significance and symbolical colouring with which they invest single rites - that we gain a real insight into the nature and gradual development of this truly stupendous system of ritual worship.