Proverbs 10:15 says, The rich man’s wealth is his strong city: the destruction of the poor is their poverty.  This can be understood to mean that the rich put their faith in their wealth.  They feel as secure as if they were in a walled city.  Of course today walls do not mean much for protection in war, but they once did.  The poor on the other hand can feel hopeless because of their poverty.  Both focus on the things of this world instead of focusing on God.  Verse sixteen states, The labour of the righteous tendeth to life: the fruit of the wicked to sin.  If we have a right relationship with God, then the things we do will lead to a better life here and an everlasting life in heaven.  Those who do not accept Christ and follow God's guidance will only be able to produce the fruits of sin.  Verse seventeen adds, He is in the way of life that keepeth instruction: but he that refuseth reproof erreth.  If we want to live a successful life in the eyes of God, then we will keep His instructions, or commandments.  Those who will not accept the reproof of God are in error.  I believe that we can be saved and yet at times refuse to follow God's guidance in a particular situation, and when we do, we are in error.  Verse eighteen declares, He that hideth hatred with lying lips, and he that uttereth a slander, is a fool.  We may say the right things, and even be friendly to someone, yet secretly hate them.  If we do, we are speaking with lying lips.  We may also spread false stories about someone, or even just repeat those that we have heard, but if we do, we are acting like a fool.  If we remember, a fool is one who has said in his heart that there is no God.  Verse nineteen says, In the multitude of words there wanteth not sin: but he that refraineth his lips is wise.  I believe this is saying that talking a lot is not necessarily a sin, but it is better to be careful about what we say and maybe speak a little less.  Matthew Henry actually says that in a multitude of talking that sin is likely to be found.  He reminds us that at least we will be held accountable for every idle word.  At least we should never allow our speech to lead us to sinful actions, such as gossip or slander.  Verse twenty states, The tongue of the just is as choice silver: the heart of the wicked is little worth.  We are told that the words of the just are worth more than fine silver, or material things.  The words of the wicked have little value, since they are controlled by an evil heart.  Verse twenty-one concludes,  The lips of the righteous feed many: but fools die for want of wisdom.  I believe we can say this refers to spiritual feeding.  When we speak with the wisdom of God, which is the only true wisdom, we feed many people spiritually, if they will only listen.  Those who deny God can never speak with true wisdom.  They make speak with knowledge and education, but they will lack any true wisdom.