Garrigou-Lagrange

Even in the natural order, no created agent acts or operates without the cooperation of God, first Mover of bodies and spirits. In this sense, St. Paul says in his discourse on the Areopagus: "Although He (God) be not far from every one of us; for in Him we live and move and are." (1) With even greater reason in the supernatural order, that we may produce acts of the infused virtues and of the gifts, we need a divine motion, which is called actual grace

- Reginald Garrigou-Lagrange, The Three Ages of the Interior Life. Vol.1. (St.Louis:Herder Book, 1947), #.

Garrigou-Lagrange talks about the necessity of actual grace. This is significant because in order to talk about the meaning of blessings, and "exciting pious devotion" or even a more precise "disposition", we need to know the meaning of actual grace.

Sacrosanctum Concilium

But in order that the liturgy may be able to produce its full effects, it is necessary that the faithful come to it with proper dispositions, that their minds should be attuned to their voices, and that they should cooperate with divine grace lest they receive it in vain [28].

-Second Vatican Council, Constitution on the Sacred Liturgy Sacrosanctum Concilium (4 December 1963), §11, at The Holy See, www.vatican.va.

The importance of disposition. This pertains because sacramentals/blessings are a means by which disposition can be cultivated.

This article is quoted in the preanotanda of the book of blessings.

This article cites Paul 2Cor6:1 "Working together, then, we appeal to you not to receive the grace of God in vain."