Have you read this passage?

I have the can’t remember where I read that blues.
A while ago I came across a passage in a book of spiritual reading, a warning that anyone who was going to make a serious attempt to grow in the Christian life was going to start running into… opposition, perhaps from annoyed friends or even family members complaining about one’s becoming “too religious,” but perhaps other obstacles too.
I thought I came across this in An Introduction to the Devout Life, by dear St Francis de Sales, but when I pulled out the book today I couldn’t find it.
Can anyone help me out? Thanks in advance.
This is another good reason to keep a commonplace book!