I've read the entire manga but, still, I don't understand that at all. Could anyone explain this to me please, 'cause I'm totally lost there...
Which part you don't understand?
I mean the meaning of this scan ^^'
Don't want to spoil the story for anyone, so I am going to be a vague as possible. The entire scan is related to the manga and the mangaka, who threw this wanted to inexplicitly tell a little bit about Ymir's adventures many years ago and how the statue was a form of prediction of an angel (Christa) who would 'save' Ymir. Would love to go deeper in explaining my assumptions, but I guess that's enough. Sorry for not being too helpful. ^^;