Yes, it is quite a claim. It’s from a recent blog post by Sheridan Voysey. Have a read.
Sheridan provides some simple ideas on keeping a journal. He also made a post some time ago with a little more detail. Basically you need some sort of notebook and a pen or pencil! You don’t aim to make an entry every day – just from time to time.
Sheridan led the recent retreat we went to at Scargill on the Sermon on the Mount. It was excellent. We think he’ll be leading another later in 2019.