"With the power of skillful means,
I have revealed the Dharma of three vehicles;
Yet all the World-Honored Ones
Teach the One Vehicle way.
Now everyone in this great assembly
Should rid themselves of doubt.
The Buddhas do not differ in their claim
That there is only One Vehicle, not two.
. . . .
All these World-Honored Ones
Have taught the Dharma of One Vehicle,
Transforming countless living beings,
Enabling them to enter the Buddha way.
Moreover, all the great saints
Knowing the deepest desires of all the gods,
Humans, and other beings of all the worlds,
Have still other skillful means to further clarify the ultimate truth."
The Lotus Sutra: A Contemporary Translation of a Buddhist Classics.
[Reeves, G. (2008).Boston: Wisdom Publications, p. 91]
《妙法蓮華經》卷1〈方便品 2〉(CBETA, T09, no. 262, p. 8, b27-c9)
"All Buddhas achieved Buddhahood by practicing the bodhisattva way. There will never be a Buddha who attained Buddhahood by practicing the ways of the solitary-realizers or hearers. Since all Buddhas practiced the bodhisattva way, the cultivation of which leads to the attainment of the Buddha Bodhi, what they have realized is most certainly the teaching of the One Vehicle, i.e., the single Buddha Vehicle. Since what they have realized is the teaching of the single Buddha Vehicle, which is the path toward the attainment of the Buddha Bodhi, when they manifest in the human world they will certainly expound this One Vehicle. But because it is difficult for sentient beings in the impure world of five turbidities to accept the teaching of the One Vehicle, Buddhas apply their skill in means to demonstrate and reveal three separate Vehicles. Yet, in the end, they will always expound the one and only Buddha Vehicle, and would not depart from the human world after teaching only the two lesser Vehicles."
A Discourse on the Lotus Sutra, Vol. 3, pp.129-130.