'Conflict' in the Bible

And if Satan really has engaged in fierce conflict with himself, how shall his kingdom stand?--because you say that I expel demons by the power of Baal-zebul.

Or what king, when he sets out to meet another king in battle, will not first sit down and consider whether he is strong enough with ten thousand men to encounter the one who is coming against him with twenty thousand?

And being in conflict he prayed more intently. And his sweat became as great drops of blood, falling down upon the earth.