'I confess I think NECESSITY should be the great disposer of a minister's course of study and labour. If we were sufficient for everything, we might attempt everything, and take in order the whole Encyclopaedia: but life is short, and we are dull, and eternal things are necessary, and the souls that depend on our teaching are precious. I confess, necessity hath been the conductor of my studies and life. It chooseth what book I shall read, and tells me when, and how long. It chooseth my text, and makes my sermon, both for matter and manner, so far as I can keep out my own corruption.'
Richard Baxter, The Reformed Pastor, p.113.