When a baker makes bread, he has to know the proper amount of yeast and water to use, as well as the right amount of flour. The best baker should also know how the wheat has been cultivated and manured. In a similar way, you have to know your mind: the neuroses, the positive possibilities, the obstacles, and the vicissitudes. You have to know reality as well as fantasies, hopes, and ideas. The teachings of the Buddha are quite realistic and pragmatic.
From “Beginning at the Beginning,” in The Profound Treasury of the Ocean of Dharma, Volume One: The Path of Individual Liberation, page 4