Someone agrees with the correct theology about Jesus and does the sorts of things Christians are supposed to do, such as caring for the poor, and standing up against wrongdoers and liars, so surely such a person must be in God’s good books? Not necessarily. There are plenty of people who still say and do the right things, but the fire inside them has gone out. Such people are addressed in the second chapter of the Revelation to John:
I know the things you do, and your hard work and perseverance, and that you will not tolerate evil people, and have investigated those people who pretended to be apostles, but were not, and found them to be liars. You have persevered and endured for my sake, without getting tired. But I criticise you for this: you left your first love. Remember what you have fallen from, and turn back and do the things you first did. If you do not repent, I will come to you and move your lampstand out of its place.
Following Jesus is not about doing the right things or even agreeing to the correct beliefs. It is about having a relationship with Jesus. That does not necessarily mean the relationship has to be highly emotional; but it does mean that the relationship has to be real and continually growing. The things that a person does and believes might be evidence of the internal relationship, but the heart of discipleship is love for Jesus, not fulfilment of religious duties.