In The Bronze Bow, what are two reasons that Daniel feels he could never marry Thacia?

As Daniel
gets to know Thacia better and as he begins living in the village and being exposed to people
who live in family units, including his friend Nathan, he begins to feel angry at the fact that
he could never marry Thacia. Two reasons stand out in his mind as insurmountable obstacles to a
life with Thacia. First is his own commitment to overthrowing Rome. He has taken a vow, and he
lives for one thing only, namely, freeing his people from Roman domination. This prevents him
from taking a wife not only because he must remain single-minded to carry out his mission, but
also because he will be putting his life in great danger, and that would be an unacceptable
thing to do if he was responsible for a wife. Secondly, Thacia's position in society is much
higher than Daniel's, meaning that Thacia's father would normally never consider such a match
for her. However, Thacia's father and mother originally determined they would allow Thacia to
choose her own husband rather than arranging a marriage for her. Nevertheless, Daniel made a bad
impression on her father, and he no doubt feels embarrassed by that. The ultimate reason for not
marrying, though, as he tells Thacia in chapter 22, is that because of the deep hatred and
vengeance that fills his heart, "There is no room for anyone
else."