כנות
Sincerity is not merely saying what one feels. People are often very open and still deeply insincere. The harder question is whether we want the good itself, or mainly the appearance of wanting it.
Motives are rarely pure. That is not the scandal. The scandal is how quickly the self arranges noble language around vanity, rivalry, fear, and the desire to be admired for caring.
Observation
A person may help in order to be seen helping, apologize in order to regain control, speak truth in order to wound, or take a moral position mainly for the pleasure of standing above someone else. The act can look clean while the inner posture is crowded.
Mussar Insight
Mussar asks for unusual honesty about motive because self-deception is one of the ego's most efficient tools. Sincerity does not demand perfection of intention. It demands that a person stop confusing performance with purity.
Civilization Check
In the good you do, how much is aimed at the good itself, and how much is quietly aimed back at your own image?