bell hooks, The Will to Change: Men, Masculinity, and Love:
Unlike happiness, joy is a lasting state that can be sustained even when everything is not the way we want it to be.
If we look at the world long enough, we may find that everything is not the way we want it to be. As a result, many of us don't look.
If we look in a comprehensive way, what can be seen is deeply troubling. Many of us arrive at the point of seeing particular problems with clarity, only to be left with the task of communicating their relevance to others.
At this point most of us experience real frustration. This can play itself out as anger, at the world and at each other; but because anger is a difficult emotion to sustain, it often leads to apathy: it becomes too painful to try, and we withdraw from our attempts to do so.
Anger is often justified, but because it can't be sustained, it can't form the basis for moving past frustration into fulfillment -- a fulfillment that is honest about what is wrong in the world, and the work that must be undertaken in response.
bell hooks points to something that must be cultivated in spite of what we very well know to be true about the world. This is what we must be prepared to offer others, if we ever want them to fall in love with our work despite its inherent difficulty.