In Night, how has the relationship between Elie and his father changed during their time in the concentration camps?

At the beginning of ,describes his father as a cultured,
unsentimental man with a rather distant manner:

He rarely
displayed his feelings, not even within his family, and was more involved with the welfare of
others than with that of his own kin. The Jewish community of Sighet held him in highest esteem;
his advice on public and even private matters was frequently sought.

Wiesel respected his father but did not feel that he knew him
particularly well. This changed when they were together in the camps, where there was no privacy
and the two had to depend on each other for survival.

Even before they are
interned, Wiesel sees his father cry for the first time, and he...