Always loudly say to the people that which they don't like to hear but what their conscience wants to hear. Think that the Divine Principle reached you over the long period of God and numerous saints shedding blood, sweat and tears. The settlement of our thought can be done, after all, by studying the Divine Principle. There was a history of blood, sweat and tears until the great Principle reached us. To inherit this, we should go the same way, without complaint.
Truth has creative power.
If you witness joyfully to this, the power will work. If you lecture with tears, even thought you did it incorrectly, you can be forgiven. Lecture about the historical view of restoration by the final victory of goodness, centering on indemnity and True Parents. The Divine Principle is to us is as the rudder is to the boat and the weight is to the scale. Curing the disease of the fall by the Principle is a more urgent and important task than curing physical diseases by spiritual power.