How Does the Mind Consciousness Perfume the Manas?

The mind consciousness must engage in attention and deliberation in accordance with the Dharma, and contemplate well all matters; at the same time, this allows the manas to understand correct principles, and gradually the manas can come to accord with correct principles. This is called permeating the manas. The mind consciousness must deliberate; without deliberation, it cannot permeate the manas. When the mind consciousness frequently contemplates a certain principle, allowing the manas to comply with it, after being permeated, the manas can also form new habitual tendencies, and the old unwholesome habits are thereby transformed.