To take heart, is to take courage, it is a command and a promise. It is a promise because the one commanding us to take heart is the same one who will give us a heart that can have courage. (John 16:16-33)
Without the Spirit of God, we allow the world to define sin, righteousness and judgement with its laws. Laws that are forever changing, forever increasing in number and laws that we have no hope of truly keeping. (John 15:26-16:15)