We cannot observe external things without some degree of Thought; nor can we reflect upon our Thoughts, without being influenced in the course of our reflection by the Things which we have observed.
- William Whewell
Thoughts, Some, Which, External
Hence no force, however great, can stretch a cord, however fine, into a horizontal line which is accurately straight: there will always be a bending downwards.
- William Whewell
Always, However, Which, Cord
The system becomes more coherent as it is further extended. The elements which we require for explaining a new class of facts are already contained in our system. In false theories, the contrary is the case.
- William Whewell
New, More, Which, Explaining
It is a test of true theories not only to account for but to predict phenomena.
- William Whewell
True, Test, Theories, Phenomena
Fundamental ideas are not a consequence of experience, but a result of the particular constitution and activity of the mind, which is independent of all experience in its origin, though constantly combined with experience in its exercise.
- William Whewell
Mind, Which, Consequence, Combined
Every failure is a step to success.
- William Whewell
Success, Failure, Every, Step
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