The existence of such a power is recognized today even in our non-agrarian societies although seldom discussed. Although the majority of people use this power it is difficult to give exact examples and so the following examples require some thought. A good starting example is with the discovery of some salespeople or gamblers that if they give away all of their available cash their chances of selling more or winning more are increased. Beggars know that they have to seed their begging bowl with their own money. No doubt you have sacrificed yourself on a new job, giving more than required and giving up some of your own interests to increase your chances of promotion.
Runners keep talking about sacrificing themselves and undergoing pain in order to gain.
Good students attempt to go beyond the requirements of the teacher and give more in order to gain more. Another example of this unusual psychology is within the Parable of the Talents in which Jesus lauds the individual who invests his money and condemns the individual who safeguards his money. Success therefore can only come to the one who is willing to seed or sacrifice part of what one has in order obtain more . There is a corresponding physiological and psychological reaction to sacrifice. One very odd aspect of humans is that if they are challenged, they will do more.