Benjamin Franklin’s 13 Virtues, #7: Sincerity Benjamin Franklin’s 13 Virtues, Virtue #7. Sincerity: Use no hurtful deceit. Think innocently and justly; if you speak, speak accordingly. Good advice for today! Related posts: Benjamin Franklin’s 13 Virtues based New Year’s Resolutions Benjamin Franklin’s 13 Virtues: #6. Industry Benjamin Franklin’s 13 Virtues: #2. Silence