The Buddha said that your own mind is a buddha. Since your mind is the actual buddha, apart from purifying your mind, there is nothing else to be done. Our task, throughout this and all our future lifetimes, is to purify our mind-streams. This means that we must eliminate our afflictive emotions and mental fabrications, because they are what defile our minds. Like water that has become dirty, our minds need to be purified of these defilements. Once you have removed all the defilements, the buddha within your mind will reveal itself.