What the Bible says about Bitter and Fresh Water
(From Forerunner Commentary)
In examining ourselves, perhaps the critical question is, "How much salt can be in the water before it tastes salty?" If our words hurt or cut others down only on occasion, does that make us guilty of all that James describes? How much confidence would we have in the kitchen faucet if we never knew whether we would receive salt water or fresh water from it? Would we fill a glass and drink it down or carefully test it each time?
When I was in school, a common practical joke was to dump salt in someone's milk or water, watch him unsuspectingly drink it down and chortle gleefully when the shock emerged on his face as he discovered what he had just consumed. When it happened to me, it was indeed a shock! No matter how many times I had watched it done to another, or participated in doing it, or how hard I laughed at another's "getting it," when my turn for a "salting" took place, it was totally unexpected and entirely unpleasant.
It happens like this in our relationships. We expect to trust one another, and we expect the "waters" of our words to be refreshing, to be pleasant, to be loving and positive. When we are hit with the "salt"—words spoken in anger, gossip, merciless criticism, or caustic sarcasm toward us when we may need some kinder attention—it is always a shock and always leaves us feeling distaste in our mouths and betrayal in our hearts.
All of us are capable of all these kinds of communication. We have to ask ourselves: Do I send both fresh and bitter water from my mouth? Does my tongue produce both figs and olives?
The apostle reveals here the nature of "the bit and the rudder" that control the horse and the ship. It is spiritual wisdom and understanding that descend upon us directly from God above that empowers us to keep our tongue in check. As earthly men, we have no means or strength to control this wild beast that resides in our tongue and expresses itself in our words. But as children of God, endowed with the power of His spirit and wisdom of His character, we can gain control over this member within. Not only that, we can use it in service to His will and purpose. If we examine our words and run them carefully through the filter of the fruit of the Spirit, we stand a far better chance of releasing the fresh waters that give life and restraining the salt waters that cause destruction.