From my daily devotional, by Billy Graham:
The problems of the world could be solved overnight if men could get victory over their tongues. Suppose there was no anger, no profanity, no lying, no grumbling or complaining; suppose there were no dirty stories told, no unjust criticism-what a different world this would be! The Bible teaches that a man who can control his tongue can control his whole personality. We should ask ourselves three questions before we speak: Is it true? Is it kind? Does it glorify Christ? If we would always think before we speak, there would be much less evil speaking, and there would soon be a spiritual awakening that would sweep the church in America.