"It is a very evil thing, whether men think so or no, to offer the blind and the lame, the torn and the sick, in sacrifice to God. If we worship God ignorantly, and without understanding, we bring the blind for sacrifice; if we do it carelessly, and without consideration, if we are cold, and dull, and dead, in it, we bring the sick; if we rest in the bodily exercise and do not make heart work of it, we bring the lame; and, if we suffer vain thoughts and distractions to lodge within us, we bring the torn. And is not this evil? Is it not a great affront to God and a great wrong and injury to our own souls? -
Matthew Henry (1662 - 1714)
Recommended reading:
A Quest for Godliness - The Puritan Vision of the Christian Life, by J. I. Packer