The sun of righteousness is the aura that pours forth from a heart that is full of the Holy Spirit of God. A heart that is full of the Holy Spirit of God is a heart that is full of love. The aura's white color signifies purity in mind, in thought, as well as in action. It is referred to as a sun because when it sets, it is seen as a brilliant plethora of sparkling diamonds radiating from the core of the solar plexus.
The sun of righteousness is referred to in Scriptures, such as in Malachi 4:2 which states that it "will rise with healing in its wings." The word "wings" is an allegorical reference to the hands. When our righteousness is more than a hypocritical show of devotion, when it surpasses the righteousness of the New Testament Pharisees, when it emanates from a cleansed heart, we will know because from that heart will flow God's healing balm.
Genuine righteousness produces a capacity to appropriate God's healing powers for yourself, and for others. Until your righteousness surpasses that of the Pharisees, you are not yet ready to serve in the kingdom of God (Matthew 5:20; Revelation 20:6).