Who said "We have to be better. We must be better."?

This quote is attributed to Batman (DCEU).

We have to be better. We must be better. - Batman (DCEU)

"We have to be better. We must be better."

Batman (DCEU)

"Do you bleed? You will."

"That's how it starts. The fever, the rage, the feeling of powerlessness."

"We have a list of names, but we are not going to read them."

"The world has been so caught up in what he can do, nobody has asked what he should do."