In the Divine Directions, God the Parent tells us:

Constancy is sincerity. It will not do to change your resolve.

April 27, 1891

This passage teaches us that once we make a resolve, we are expected to abide by it without giving up in the middle and without bending it to suit our convenience. Only when we show constancy in implementing our resolutions and see them through to completion can we say that the mind is sincere.

The [third] Shinbashira often draws our attention to this by saying such things as: "Whenever an occasion demands setting goals for ourselves, we find it relatively easy to be decisive in making resolutions. What we find rather difficult is the constant effort to remain focused on those resolutions--without forgetting them or changing them--right up until the day we have finally accomplished them. Remember, a resolution is not merely about setting goals for ourselves; it is about attaining a steady resoluteness of mind by tirelessly striving to fulfill the goals we have decided upon." This advice is entirely consistent with the Divine Direction in question: "Constancy is sincerity. It will not do to change your resolve."

In another Divine Direction, we read:

Because it continues, it can be called a path. Without continuity, it cannot be called a path.

May 21, 1906

Even the most worthy action only reveals its true value when we persevere in implementing it time and again. An action performed on a single occasion or on a whim cannot really be said to be an expression of true sincerity. Naturally, doing something worthwhile even once is preferable to doing nothing at all, and we should never pass up an opportunity to implement good deeds whenever the urge strikes us. Nonetheless, the quality of true sincerity results from a continuous and steady effort to implement actions, however insignificant or inconspicuous they may seem.