"An house is of a double nature, viz., one, wherein it is a way and means of expence, the other as it is an instrument and tool of gain"

This quote by William Petty is referring to the dual nature of a home. On one hand, a home can be viewed as a method of expending money, as it requires a substantial monetary investment to acquire or construct a house. On the other hand, a home can be seen as an instrument and tool of gain, as it can be rented out or cost a revenue. This quote highlights the truth that a house can be both a monetary concern and a monetary asset, depending on the scenarios.

The quote also implies that a home can be used as a form of investment. By purchasing a home, one can potentially make a profit in the long run. This is particularly real in locations where the worth of real estate is increasing. By investing in a house, one can gain from the gratitude of the property with time.

Overall, this quote by William Petty is a pointer of the double nature of a home. It can be seen as both a method of expending money and an instrument and tool of gain. It depends on the private to decide how to use a home to their advantage.