Buddha attained supreme enlightenment through meditation and then spent His whole life converting sentient beings. The Four Foundations of Mindfulness Sutra teaches a method of meditation to gain no-self, and to enter Nirvana.
Meditation Retreat
Meditation is to practice concentrating on mind. It is to lead mind to peace and insight, and to keep mind away from thought and sentiment. Meditation can help practitioners destroy self and ignorance, and then attain Enlightenment.