Charles H. Spurgeon on Psalms 64:8

Their own tongue to fall upon themselves. The arrows of idle words, though shot out of sight, and possibly quite forgotten, will hereafter drop down upon the heads of such as drew the bow. Words are but wind, is the common saying, but they are such wind as will either blow the soul to its haven of rest, if holy, wholesome, savoury, spiritual, and tending to edification, or else sink it into the Dead Sea and bottomless gulf of eternal misery, if idle, profane, frothy, and unprofitable. Edward Reyner (1600-1670) in "Rules for the Government of the Tongue."