The Four Great Vows (四弘誓願)

The teachings are infinite; we vow to learn them all.
法門無量誓願學
法門 Pinyin: fǎ-mén. Meaning (literal): Dharma gate. Composition: 法 + 門 (“Dharma” + “gate”)
無量 Pinyin: wú-liàng. Meaning: immeasurable. Composition: 無量 (“no” + “measure”)
學 Pinyin: xué. Meaning: learn