Yet sincerity, as a purifier, brings about a crystal clarity, which enlightens consciousness as gas gives flame. This quality of invocation is as necessary as light. Each one may cast his eye into his heart and inspect the small corners of a decrepit world. Without sincerity there will be no current. Therefore strain all your forces and elect pure striving of the heart.
Sincerity is associated with the pure striving of the heart.
Precisely, Star Searcher. So sincere, honest, non deceptive striving is pure striving. Your best guess, Star Searcher. Well, since it applies to my thinking and actions, it just has to apply to my speech. Therefore, every time we open our mouths to speak we take the test of non deceptive, honest, sincere speech.