GRATITUDE is a choice that becomes a habit. It is a major ingredient in the alchemy of transformation and is closely related to love... Gratitude creates a combustion of energy that powers our living cells. That's why all spiritual traditions teach the importance of gratitude. It certainly isn't because the deity needs any reassurance. Rather it's because when we are in the state of gratitude, we're affirming our faith in our own highest good and denying authority to the paralyzing, constricting energy of fear.
"Perfect love casts out fear." It is not be thinking ourselve sright that we cease to fear. It is simply by loving, and abandoning ourselves to the One whom we love without returning to self. That is what makes death sweet and precious. When we are dead to ourselves, the death of the body is only the consummation of the work of grace.