Expectation can be considered the opposite function of desire, specifically when one expects a reward from being of service, it also ties us into the low frequencies, to the desires of the physical and therefore delivers a level of Karma.
Expectation is something to be avoided from a more personal perspective, especially when we “expect” a certain response or action from a friend or colleague.
Expect nothing and gain two things;
1) Freedom from the karmic link that expectation gives us
2) Joy when a friend or colleague responds in the correct or most spiritually desirable way.