The Trinity: “Try and understand it and you will lose your mind; seek to deny it and you will lose your soul!” At least that’s what some anonymous preacher once said. I’m not sure the last half is theologically sound, but the “losing your mind” part 
may come close to the truth! One thing is for certain: the triune nature of God is not the invention of man. We would have never dreamed up such a thing! We couldn’t! No, we are forced to believe it because Scripture has declared that imponderable fact to be the truth about who God is.
The bare fact of Scripture is that there is only one God. That’s fine, and we can see the logic behind it. But then we are told that there is Someone called the Father who is God, Someone called the Son who is God, and yet another Someone called the Spirit who is God–and none of these are to be identified as any of the other Two! Okay, now I’m lost!
Ravi Zacharias explained this in perhaps the best way I have ever heard. I could never do better, so check out the answer he gave a Penn State student in this video clip.
I love Ravi good choice, I have heard him explain the doctrine of the trinity several times and I agree with you that nobody explains it better.