metaxu ~= "in between"

bodhisattva vow

The passions of delusion are inexhaustible. I vow to extinguish them.
The number of beings is endless. I vow to save them.
The Truth cannot be told. I vow to tell it.
The Way which cannot be followed is unattainable. I vow to attain it.

The Bodhisattva vow