To every student the best hours of the day are those before the sun has reached the meridian.

Then the mind is the most clear and vigorous.

I have never in my life prepared sermons a dozen times after my supper.

Severe mental work in the evening is apt to destroy sound sleep; thousands of brain workers are wrecked by insomnia.

To secure freedom from needless interruption I pinned on my study door "_Very Busy_." This had the wholesome effect of shutting out all time-killers, and of shortening necessary calls of those who had some important errand.