Faith is one such purified emotion. Faith is much easier for people whose primary defilement is greed, rather than hate. Faith arouses pleasant feelings, which is greed's direction. In this case, greed is an asset, although basically it is, of course, a negative characteristic. But if we use it in a positive way, we are engaged in a purification process, wanting that which is wholesome, which leads us to the supermundane.
First greed opens up into faith, resulting in pleasant feelings.
All are cravings, but they're going in the right direction, of using greed to get rid of greed. If we use our craving in that manner, we are at least searching for that which will give us the greatest benefit, rather than pleasure through the senses. The Buddha's path is called the middle path, which means a path of balance. We have to balance all extremes, so that they become a useful basis for a harmonious person, whose practice will flourish. This is one reason why the Buddha recommended the meditation on the loathsomeness of the body.