Engage yourself in service activity. Consider social service as service to God. To earn the Love of God, this is the easiest way. The best way to love God is to love all and serve all. Your entire life sanctified thereby.
Devotion consists in expressing love towards all.
You cannot effect a change of heart by speeches. They often lead to confusion and conflict. Better than speeches is practice of love with faith in the divine. Follow the path of love and redeem your love. Man knows that God is the very embodiment of love.