We meet with this work out the head of several of the Psalms. The meaning certainly is, to instruct. But wherefore some Psalms should be thus prefixed with a title, and others not, is not so very plain, since the whole book may be justly said to be Psalms of instruction. Some have thought, therefore, that it hath reference to instruct in the music of the Psalm.
See Musician.
Written as an appendix to his "poor man's commentary", this classic stands the test of time, helping to explain in layman's terms over 1,500 topics, names and places from the Bible.Wikipedia
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