What is the central point made out in the passage?

Directions: The short passage below is followed by a question based on its content. Answer the question on the basis of what is stated or implied in the passage.

Many of you have long experienced in your manufacturing operations the advantages of substantial, well-contrived, and well-executed machinery.
Experience has also shown you the difference of the results between mechanism which is    neat, clean, well arranged, and always in a high state of repair; and that which is allowed to be dirty, in disorder, and without the means of preventing unnecessary friction, and which therefore becomes, and works, much out of repair. In the first case the whole economy and management are good, every operation proceeds with ease, order, and success.
In the last, the reverse must follow, and dissatisfaction among all the agents and instruments interested or occupied in the general process, which cannot fail to create great loss.
If, then, due care as to the state of your inanimate machines can produce such beneficial results, what may not be expected if you devote equal attention to your vital machines, which are far more wonderfully constructed?
When you shall acquire a right knowledge of these, of their curious mechanism, of their self-adjusting powers; when the proper mainspring shall be applied to their various movements— you will become conscious of their real value, and you will readily be induced to turn your thoughts more frequently from your inanimate to your living machines; and you will discover that the latter may be easily trained and directed to procure a large increase of pecuniary gain, while you may also derive from them a high and substantial satisfaction.