I have often heard this verse quoted and many have memorized it as a type of formula. People suppose it’s about the numbers, “two or three,” but the Greek implies that it’s more about being in agreement, praying in His name.
As you can probably tell from the spelling, this is the origin of our English word, symphony, a word that means to be harmonious, or to agree. The definition gives the idea that we as His instruments are not only to be in tune with each other, but in the key of our Great Composer’s choice. Being out-of-tune produces nothing but discordance, but as we gather around Him, and play (or pray) in harmony, our eyes on Him as He conducts, He will orchestrate a beautiful, God-glorifying work.