Matthew Henry on Psalms 94:1-11

We may with boldness appeal to God; for he is the almighty Judge by whom every man is judged. Let this encourage those who suffer wrong, to bear it with silence, committing themselves to Him who judges righteously. These prayers are prophecies, which speak terror to the sons of violence. There will come a day of reckoning for all the hard speeches which ungodly sinners have spoken against God, his truths, and ways, and people. It would hardly be believed, if we did not witness it, that millions of rational creatures should live, move, speak, hear, understand, and do what they purpose, yet act as if they believed that God would not punish the abuse of his gifts. As all knowledge is from God, no doubt he knows all the thoughts of the children of men, and knows that the imaginations of the thoughts of men's hearts are only evil, and that continually. Even in good thoughts there is a want of being fixed, which may be called vanity. It concerns us to keep a strict watch over our thoughts, because God takes particular notice of them. Thoughts are words to God.