When in crisis - thoughts from J John

I received an email today from J John and it was a reflection on crisis. It included this:
"Pastor Andrew Murray of South Africa once faced a particularly bad crisis. Taking himself off to his study, he sat quietly for a very long while; prayerfully and thoughtfully.
Then he wrote this in his journal:
1. I am here by God's appointment; in that fact I will rest.
2. He will keep me here in His love and give me grace to behave as His child.
3. He will teach me the lessons He intends me to learn.
4. In His good time He can bring me out again."