the light of love is born when our hearts are touched and we open ourselves to the interior presence of the beloved, who enables us to recognize his mystery.
It is a divine grace when one can experience the presence of God in one's heart. After such an experience you are able to go and to preach the Good News to unbelievers. Since when you entered the deep mystery of God, you were also encouraged to share this experience with others. Accordingly, you feel that God is alive in you and does not allow you to be silent about him.