Related to this, sometimes explaining to people why charity is not what it sells itself as (altruism) is difficult without significant context. In this context,

Related to this, sometimes explaining to people why charity is not what it sells itself as (altruism) is difficult without significant context. In this context, it's easy to understand, but to someone with a belief that charity is always altruism, it is hard to show them why it is almost never purely about altruism, and sometimes very far from it.