A Jewish proverb says, “A friendless man is like a left hand bereft of the right.” Consider how much having only one hand hinders productivity. When both hands are available, much more can be accomplished and every activity is easier. How much greater is the production of two people doing a task than if the labor is restricted to only one? Even when the two divide the profits, each receives a better return for his efforts than if each had worked alone.
The instruction moves on to contemplating that, if there is trouble along the way, two are more likely to come up with a solution than one working alone. If a person is working alone and falls, no one else is around to help him.
What happens when we stumble during our spiritual walk? Is it not good to have a friend off whom we can bounce things and from whom we can receive correction and encouragement in love? Galatians 6:1-2 addresses this issue: “Brethren, if a man is overtaken in any trespass, you who are spiritual restore such a one in a spirit of gentleness, considering yourself lest you also be tempted. Bear one another's burdens, and so fulfill the law of Christ.”
Ecclesiastes 4:11-12 seem to be calling to mind traveling by foot in ancient Israel where it might be cold during the winter months and perhaps dangerous to life and limb because of attacks by robbers. There is greater productivity, warmth, and security in numbers. II Samuel 21:15-17 recounts a time a younger man came to King David's aid when he was in need:
When the Philistines were at war again with Israel, David and his servants with him went down and fought against the Philistines; and David grew faint. Then Ishbi-Benob, who was one of the sons of the giant, the weight of whose bronze spear was three hundred shekels, who was bearing a new sword, thought he could kill David. But Abishai the son of Zeruiah came to his aid, and struck the Philistine and killed him. Then the men of David swore to him, saying, “You shall go out no more with us to battle, lest you quench the lamp of Israel.”
Ecclesiastes 4:12 provides us with an example of a peculiarity of Hebrew writing that is seen in a number of places in the Old Testament. This literary device makes comparisons by using the term “better.” He first uses “better” in verse 3, then again in verse 6, and finally in verse 9 as he reaches the section's conclusion. His overall point seems to be that in most cases more is better than less: One cord may be easily broken; two would require greater strength; but three would be very difficult to break. One traveler might invite danger; two would add to both travelers' safety; but three travelers would fare even better.
What he has in mind is the matter of how unity adds to productivity, how safety is greatly increased, and how partnership with real friendship and thus greater unity makes an activity more immune to failure. Think of this as it applies to families. One person does not even qualify as a family. A husband and wife working in harmony can add immensely to each spouse's quality of life, and if Jesus Christ is the third Person in that group, the strength He contributes is immeasurably positive. Interestingly, families with many children seldom break up.