For if his motive in fulfilling their wishes is one of those ulterior motives mentioned above, he will not obtain what he wants from them in this world. he will labor in vain and will lose his reward in the world to come If however, he acts solely out of service to GD GD will help them the beneficiary to repay him in this world will put this praises into their mouth, and will increase his strature in ther eyes, and they will attain great reward in the World to come.