There are three forms of knowledge. They are knowledge
from memory, wisdom, and brightness from meditation. Knowledge from memory is
gained by studying things and memorizing them. Knowledge from wisdom is gained
by learning and experiencing many various things, which we have gone through in
our lives. Knowledge form brightness from meditation is the inner brightness
that shines on our mind to understand the way things are and then to think,
speak, and act correctly. Actually, we need a perfect teacher who can teach us
the knowledge from meditation.