Have you noticed how it’s much easier to learn about a topic when you’re interested in it?
The more we’re interested in the subject matter, the easier we will learn. Which means, if there’s something we tell ourselves we “ought” to learn, but we really don’t care about, the more difficult it will be to follow through. Instead of just trying to force it, it would be better to revisit “why” we need to learn it, and see if there’s a compelling reason that will make us actually want to do so.
It also means that if we’re trying to teach someone else, the ease of the job will be related to how eager they are to learn. Perhaps they were already interested. Or, perhaps they became interested because of how we introduced the topic. Regardless of how they get there, finding a desire to learn is critical, and makes things better for everyone involved—teacher and student alike.