The following is in the introduction to Thomas Brook's book on satan's devices. His illustrations broaden every chapter.....
"And now, if thou pleasest, read the work, and receive this counsel from me.
First, Thou must know that every man cannot be excellent, that yet may be useful. An iron key may unlock the door of a golden treasure, yea, iron can do some things that gold cannot.
Secondly, Remember, it is not hasty reading, but serious meditating, upon holy and heavenly truths, that makes them prove sweet and profitable to the soul. It is not the bee's touching of the flower that gathers the honey, but her abiding for a time upon the flower that draws out the sweet.
Thirdly, Reader, if it be not strong upon thy heart to practise what thou readest, to what end dost thou read? To increase thy own condemnation?