Be Careful!

 Read Ecclesiastes 10.

Solomon spoke 3000 proverbs and wrote 1005 songs (1 Kings 4:32).  This entire chapter, and into the opening verses of chapter 11, is given to wise observations that teach by contrast or comparison.  Here we are warned that a life of wisdom can be overturned in a moment.

1. A wise person is careful about their directions. (vv.1-9)
One may live for God and do great things in His name.  Many people may benefit from their service.  Then, with a single foolish decision or act, their entire reputation may be destroyed and considered worthless.  The highway sign is a good reminder: Keep Right. 
"Look carefully then how you walk, not as unwise but as wise, making the best use of the time, because the days are evil." (Ephesians 5:15-16)

2. A wise person is careful about their duties. (vv.8-10)
Such a one wants to be the most effective and efficient person on the job.
"...not by the way of eye-service, as people-pleasers, but as servants of Christ, doing the will of God from the heart, rendering service with a good will as to the Lord and not to man..." (Ephesians 6:6-7)

3. A wise person is careful about their discussions. (vv.12-20)
People respond best to gracious or kind words.  No one enjoys the endless, meaningless rants of a fool.  And, one can never tell where those words, once said, may end up.
"Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear." (Ephesians 4:29)