We have seen that man, by his nature, is entirely dependent upon property.

Each man necessarily controls his own energy, and in that control each man employs some of  his energy as a consumer of property.

We are not concerned here with whether it is good or bad for a man to depend on property, or upon which property he should depend, or in what quantities. 

It is simply and undeniably a fact (objective principle) that man depends on property, and that therefore he must be able to control property for his own consumption and utilization.

Man by his nature is also a seeker of profit or gain.  This appears (by observation) to be an inherited, innate, or instinctive trait.  It observably applies to all men and women.

Every man and woman, irrespective of creed, color, or condition in life, seeks satisfactions for himself.  The nature of these satisfactions will vary by individual, according to their own subjective judgements of value, but this fact of human nature remains. 

Each human individual will invariably seek the the greatest satisfaction of his needs and wants, in a manner that is consistent with what he values most at any given point in time.  These satisfactions arise in his or her relationships with other individuals, and with property.

When a man is frustrated, he has been thwarted to some degree in his efforts and desire to obtain satisfaction for his wants (profit or gain).