Before you try to convince anyone else, be sure you are convinced, and if you cannot convince yourself, drop the subject.
The tears I feel today. I'll wait to shed tomorrow. Though I'll not sleep this night. Nor find surcease from sorrow. My eyes must keep their sight: I dare not be tear-blinded. I must be free to talk. Not choked with grief, clear-minded. My mouth cannot betray. The anguish that I know. Yes, I'll keep my tears til later: But my grief will never go.