Meditation can be misused. It is then no longer a help toward the spiritual liberation of man but another captivity to keep him from it. It is misused when the object is to gain occult powers. These merely cater to the ego's aggrandizement. It is misused when the object is to become a prophet, teacher, or reformer who will influence or lead people. This merely caters to the ego's spiritual ambition, which is the same force as worldly ambition working on a higher level.
-- Perspectives > Chapter 4: Elementary Meditation > # 37