In the Mahayana (Great Vehicle) form of Buddhism, the path to becoming a great Bodhisattva (Enlightened Being), is taught. Here is a famous scripture about Earth Treasure Bodhisattva and how he became, over many lifetimes, one who helps all beings become wiser, more compassionate and full of power.
http://www.buddhasutra.com/files/ksitigarbha_sutra.htm