Our function is extension. All guilt and sadness come from not fulfilling this function. 1. In Heaven our function is creation, in which we extend God's function of creation (see T-9.III.8:1-5). 2. On earth our function is healing (see T-12.VII.4:6-9), which comes from extending forgiveness to others. This is how we reach happiness. The Holy Spirit gives us a special form of this extension, which is called our special function. 3. The Holy Spirit's Own function is to heal us, to lead us back to God, to return us to eternity. See teaching. See T-13.IV.1.