We can see the great holiness of St. Jean Marie Vianney, also known as the Cure of Ars, from these excerpts from a couple of his sermons on prayer. The transcript for this Podcast can be found at https://www.ourcatholicprayers.com/St-Jean-marie-vianney-on-prayer.html

Links to short prayers:

https://www.ourcatholicprayers.com/aspirations.html

Links to other sermons by Jean-Marie Vianney:

https://www.theworkofgod.org/Library/Sermons/JdVianey/Sermons.htm