Orihime/Sanzou-hoshi:
Even the light of my own heart trembles with vague uncertainty.
I am doubting this world. I have begun to doubt the hearts of mankind.

Kaede/Kanzeon:
Don't be sad.. Don't mistrust yourself
even a righeteous heart is sometimes unreliable. 
However, remember the feeling of your mother's tender hand 
if everyone gazes upon that hand 
they will be full and overflow with light.

(overlaping)
O: I am doubting this world. 
K: However, remember the feeling of your mother's tender hand 
O: If everyone gazes upon that hand
K: the light of my heart in vagueness trembles with uncertainty
O: they will be full and over flow with light.