The mind is the source of everything. Buddhism is not a method of realisation of the self, there is no self (atman). Self is empty of inherent existence, as are all phenomena, and only a relative concept of the mind. There are no phenomena, they are empty concepts. But this is the View of a Buddha. A person who has attained full enlightenment. By practising compassion you will develop the View. By meditating on emptiness you will see the need for compassion. Once you want to eradicate all suffering the Bodhicitta mind will arise,the wish to liberate all sentient beings. There is no ego, so why do you suffer from it by clinging to it ?