What is meant by perfuming the manas?

When the mind consciousness contemplates the dharma, forming its own thoughts, concepts, views, and knowledge, this constitutes perfuming the manas. Only when the mind consciousness contemplates with focused attention does the perfuming become effective. When it draws the manas's attention and serious regard, that is the initial effect. When the manas gives rise to alertness and deliberation (manana), the effect becomes more pronounced. When the manas's deliberation is focused and deep, and moreover accords with reason, the effect of perfuming becomes even more evident. When the manas's deliberation gains a thread to follow, the effect begins to manifest. When the manas deliberates out the flavor of the dharma and arrives at a preliminary discernment, the true effect emerges. When the manas reaches a very clear and reasonable conclusion, firmly acknowledging what it has deliberated and making the corresponding discernment and judgment, it can be said that the perfuming has succeeded. The manas has transformed, and thereafter all mental actions will transform, revolving around the manas's judgments and discernments—this is perfuming brought to completion.