The Generosity We Ought to Expect from God (Luke 17:3-4)

In which I try to make a brief video but it ends up being 8 minutes.

St. Theresa of Avila as quoted in "Letters of St. Therese of Lisieux", translated by John Clarke O.C.D. (God rest his soul), vol. II pp.829-830.

St. Luke 17:3-4, Douay Version.

1 Corinthians 4:7:

Or what hast thou that thou hast not received ? And if thou hast received, why dost thou glory, as if thou hadst not received it?

I cannot find the painter of the thumbnail, but I took it from the US Catholic article: "Why do Catholics venerate the Sacred Heart of Jesus?"