Perseverance

 

 It's very strange that when I search for this book, the title wants to change to The Three Conversions in the Spiritual Life, or the Three Conversions of the Spiritual Live.  

Why can't it be both?

The book I read, by Father Reginald Garrigou-Lagrange, OP is The Three Conversions and the Three Ways of the Spiritual Life.  

It is two books summarized.  Much of it is over my head, but I did learn the three ways to obtain a good spiritual life: purgative, illuminative, and unitive.  They meld into each other gradually.  Basically, it's fake it 'till you make it.  Your meditation will stall, grow in spurts, veer off, and might fall off.  The trick is to keep on trying.  Eventually, you will get it.  Garrigou-Lagrange gives examples which will help.