Robert Murray McCheyne to a fellow pastor:

“Take heed to thyself.
Your own soul is your first and greatest care.
You know a sound body alone can work with power,
much more a healthy soul.
Keep a clear conscience through the blood of the Lamb.
Keep up close communion with God.
Study likeness to Him in all things.
Read the Bible for your own growth first,
then for your people.”

Horatius Bonar, Words to Winners of Souls, p. 10.