The Kingdom of Heaven Is at Hand

In chapter four, Jesus faces temptation and the wilderness from the devil himself. And then in chapter five, we get the first of the big five speeches around which the book of Matthew is structured. They not Rome are going to be his chief enemy. The whole Trinity is there affirming that he's the son of God for anybody who's paying attention. But also the religious leaders show up at Jesus baptism and we get a foretaste of the resistance they are going to pose to Jesus throughout this story.