The number one type of wisdom that Buddhism wants you to develop is an understanding of the Four Noble Truths. To understand that if you have Dukkha, it's coming from something that you've done. To understand that there's a way out of Dukkha. And to understand the methods by how to do it, and then, of course, to get on with doing it. That type of understanding is basically number one.
Understanding the Law of Kamma, and the Law of Cause and Effect, fits here, as well, because in order to understand where Dukkha comes from and how do we get rid of it, we do need to understand the Law of Cause and Effect. If we do something, what is the result? If we do something else, what is the result? So Buddhism, as far as the word, Wisdom goes, is quite specific as to what particular wisdom is involved in purifying the mind and the heart.
This wisdom doesn't include whether the earth is round or flat. Couldn't care less. It doesn't include whether the moon is actually made up of cheese or rock, it doesn't care. That sort of intelligence, that sort of intellectual pursuit of understanding worldly things, doesn't matter as far as this practice goes. The wisdom to understand your own anger: to know whether it's there, to know whether it's not there, to know where it came from, and to know how it goes away - that's important wisdom to work with in this practice. How do we cultivate this wisdom? How do we deepen this wisdom? All the techniques that we're giving you here, they're all for cultivating deeper wisdom.