When listening to what Jesus says to the people following the encounter with the Pharisees, remember to take into account the entire section. It starts with Jesus telling the people not to follow the example of the Pharisees, who do not practice what they preach. This is why he follows that mandate with instructions not to call anyone Rabbi, Father, or Teacher. Because we should never use those words? No, because these words were meant as titles of higher social standing, which is exactly what the Pharisees were after. We aren't to seek high titles and high esteem, but we are to humble ourselves and allow God to handle the exalting.