Unfolding Destiny

What the Master meant in the words you quoted is simply that joy gives one more freedom to create; if the Prophets, the Master Himself, and the Guardian, had less problems and worries, They could give forth a great deal more creatively to the Cause. When He said that “grow to be as a fruitful tree” he meant that, by lifting burdens from the Guardian and trying as much as possible to do our share of the work of the Faith, we would help Shoghi Effendi to develop his full powers as Guardian and, through the Covenant, the Cause would spread its shadow over all men. This we have seen happen in the last 30 years, but that does not mean we must not try to our utmost to help him by our lives and our services.

Teaching is an individual matter; one has to sense when it is right to go further in revealing the Source of our Message; no rules exist, really, for such things.