The Few That Are Saved

"They who are enlightened to walk in the way of perfection, and through lukewarmness wish to tread the ordinary path, shall be abandoned." -Blessed Angela of Foligno

"If you want to be certain of being in the number of the Elect, strive to be one of the few, not one of the many. And if you would be quite sure of your salvation, strive to be among the fewest of the few; that is to say, do not follow the great majority of mankind, but follow those who enter upon the narrow way, who renounce the world, who give themselves to prayer, and who never relax their efforts by day or night, so that they may attain everlasting blessedness." -St. Anselm

"Many begin well, but there are few who persevere." -St. Jerome

http://www.catholicapologetics.info/modernproblems/ecumenism/fewsave.htm
http://www.romancatholicism.org/jansenism/fathers-fewness.htm