The Trinity

The Trinity is an important and fundamental truth about God that Christians teach. God is Father, Son, and Holy Spirit. Some, however, don't understand it (I'm sometimes scared to talk too much about it myself for fear of blaspheming). Isn't this polytheistic? It is not. Overall how there can be one God and three persons is a profound mystery to us, but we do have some illustrations to explain it. God is three persons but one essence. He is three persons but only one in nature. Think of a triangle. A triangle has three corners, but is still one triangle. God isn't 1 + 1 + 1 = 3, He's 1 x 1 x 1 = 1.

It's also fundamental for understanding some of God's nature. Christians all agree that God is a God of love (1 John 4:16), we also agree that God never changes (Hebrews 13:8). He's the same yesterday, today, and will be the same forever, so we can safely assume that God has always been a God of love. However, in order to love, there must be a lover. Before creation, who was God loving? The Trinity makes that more clear. There's a lover (Father), a loved one (Son), and a spirit of love (Holy Spirit). There is an "I - You" relationship within God Himself. This is a profound mystery and one of the most beautiful truths about our God!

For a much better explained look into the Trinity I recommend reading Mere Christianity by C. S. Lewis and Can Man Live Without God by Ravi Zacharias. Also chapter one of Who Made God? gives a brief answer to the question.