The former part of this verse speaks of thoughts, the latter of words,
but they come all to one; for thoughts are words to God, and words are
judged of by the thoughts from which they proceed, so that, 1. The
thoughts and words of the wicked, which are, like themselves, wicked,
which aim at mischief, and have some ill tendency or other, are an
abomination to the Lord; he is displeased at them and will reckon for
them. The thoughts of wicked men, for the most part, are such as God
hates, and are an offence to him, who not only knows the heart and all
that passes and repasses there, but requires the innermost and
uppermost place in it. 2. The thoughts and words of the pure, being
pure like themselves, clean, honest, and sincere, are pleasant words
and pleasant thoughts, well-pleasing to the holy God, who delights in
purity. It may be understood both of their devotions to God (the words
of their mouth and the meditations of their heart, in prayer and
praise, are acceptable to God, Ps. xix. 14; lxix. 13) and of their
discourses with men, tending to edification. Both are pleasant when
they come from a pure, a purified, heart.