You may not realize this or even believe it. Everyone has a king! Those who live in countries like Saudi Arabia would readily agree with that–they are ruled by an absolute monarch. Those who live in countries like Great Britain might have some understanding and yet some disagreement–they have a Queen, a Prime Minister and a Parliament. But a king? Citizens of the 
United States might say, “No, we have a President, not a King!” Everybody has their opinion on this, based probably solely on their country of nationality or residency.
However, it doesn’t matter WHERE you live on this earth or WHEN you live. Everyone has a king! Who is your king? In the Old Testament, the Jews had God as their King (1 Sam. 12:12), but they chose a different king (1 Sam. 8:5, 7). In the New Testament, Jesus is King (John 18:36-37; 1 Tim. 1:17); in fact, He is King of kings (1 Tim. 6:15; Rev. 1:5; 17:14; 19:16); but some choose another king (Rom. 6:12; John 12:31). While there are multiple kings to serve, Jesus said you can only serve one (Matt. 6:24)! Who is your king?