The Eternal Father speaks to Catherine:

Keep in mind that each of you has your own vineyard. But every one is joined to your neighbours’ vineyards without any dividing lines. They are so joined together, in fact, that you cannot do good or evil for yourself without doing the same for your neighbours.

All of you together make up one common vineyeard, the whole Christian Assembly, and you are all united in the vineyard of the mystic body of holy Church from which you draw your life. In this vineyard is planted the vine, which is my Only-Begotten Son, into whom you must be engrafted.

It is charity that binds you to true humility – the humility that is found in knowing yourself and Me. See then that as workers I have sent you all. And now I am calling you again, because the world is failing fast. The thorns have so multiplied and have choked the seed so badly that it will produce no fruit of grace at all.

I want you, therefore, to be true workers. With deep concern help to till the souls in the mystic body of holy Church. I am calling you to this because I want to be merciful to the world as you have so earnestly begged Me.

From the Dialogue of St Catherine of Siena – Chapter 24