The third instance shows the value of the protection afforded by a companion's presence when danger threatens. If one prevail against him, two shall withstand him; better, if a man overpower the solitary one, the two (Ecclesiastes 4:9) will withstand him.
The idea of the traveler is continued. If he were attacked by robbers, he would be easily overpowered when alone; but two comrades might successfully resist the assault. And a threefold cord is not quickly broken.
This is probably a proverbial saying, like our "Union is strength." Hereby the advantage of association is more strongly enforced. If the companionship of two is profitable, much more is this the case when more combine.
The cord of three strands was the strongest made. The number three is used as the symbol of completeness and perfection. Funiculus triplex diffcile rumpitur, the Vulgate rendering, has become a trite saying; and the gnome has been constantly applied in a mystical or spiritual sense, with which, originally and humanly speaking, it has no concern.
Herein is seen an adumbration of the doctrine of the Holy Trinity, the Eternal Three in One; of the three Christian virtues, faith, hope, and charity, which go to make the Christian life; of the Christian's body, soul, and spirit, which are consecrated as a temple of the Most High.