From Laura Wood over at The Thinking Housewife:
The Fewness of the Saved
How narrow is the gate, and strait is the way that leadeth to life: and few there are that find it!
— Matthew VII, 14
“The doctrine which naturally emerges from Our Lord’s words, that the majority of men follow the path of perdition may seem harsh and discouraging; there is no shortage of thoughtful minds who try to escape the conclusions which appear to flow from it …. Our Lord tells us that the immense influence of the majority of the men we live among is added to our own weakness and to our evil inclinations to lead us on. We shall always have the crowd against us: the example of the crowd has always held back, and continues to hold back, many souls in the pursuit of perfection. It is the example of the multitude among Catholics which ever provides a pretext for those outside her fold not to enter it. It is the example of the multitude of so-called Christians that closes the hearts of millions of unbelievers to the evidence of the Gospel.”
— Fr. Henry James Coleridge S.J., Life of Our Life (quoted in On the Fewness of the Saved, 2017)
The Little Number of Those Who Are Saved by St. Leonard of Port Maurice
https://olrl.org/snt_docs/fewness.shtml
I made an effort to study Hell and found several great books. I found many instances in these books where God allowed people to come back to life to provide warnings to the living. A handful of times, the dead communicated the number saved vs the number damned. The ratio I calculated of “saved to damned” was 1 soul saved for every 5,000 damned. The gate is very narrow people. The Dogma of Hell by Schouppe was one of the books if you wish to read for yourself.
Best book on the topic. Makes very clear this is a perennial teaching of the Faith.
https://www.traditionalcatholicpublishing.com/on-the-fewness-of-the-saved