Charles H. Spurgeon on Psalms 39:2

I was dumb with silence, etc. That is, for a while I did what I resolved; I was so long wholly silent, that I seemed in a manner to be dumb, and not able to speak. I held my peace, even from good; that is, I forbore to speak what I might well and lawfully enough have spoken, as from alleging anything that I might have said in mine own defence, from making my complaint to God, and desiring justice at his hands, and such like; to wit, lest by degrees I should have been brought to utter anything that was evil, and whilst I intended only to speak that which was good, some unseemly word might suddenly slip from me; or lest mine enemies should misconstrue anything I spake. Arthur Jackson.