When we talk about the notion of self in Buddhism, it is important to bear in mind that there are different degrees or types. There are some types of sense of self which are not only to be cultivated but also to be reinforced and enhanced. For instance, in order to have a strong determination to seek buddhahood for the benefit of all sentient beings, one needs a very strong sense of confidence, which is based upon a sense of commitment and courage. This requires a strong sense of self. Unless one has that identity or sense of self, one will not be able to develop the confidence and courage to strongly seek this aim.