Well, the thing is that most Christian denominations, Catholics and Protestands alike, base most of their doctrines in the Theology of Augustin and Aquinas who themselves were big fans of Greek Philosophy, mainly that of Plato and Aristotle respectively. And when you read what the Bible teaches about these philosophies, you realize that you are not supposed to do that (Colossians 2: 8) because then you destroy the truth.
The question you posted arises under the assumption that Jesus is God. In that case, things get really difficult, you know. You wonder: when Jesus prayed... Who did he pray to? Himself? When he said stuff like "Remove this cup... But let not my will take place but yours" What was the point?... And who resurrected Jesus? Himself? How exactly? Wasn't he supposed to be dead?... And if he set an example for us, when he quoted the Hebrew Scriptures saying: "You must love Jehovah your God with all your heart", was he teaching us to be love ourselves?... And could Jesus sin? If he could, who was he accountable to? Who would punish him or give him a reward? Why did Satan tempt him?
But when Jesus is the Son of God, as the Bible says, the answers are easy. Jesus prayed to his Father; when he died, Jehovah resurrected him; Jesus never talked much about himself but about his Father whom he knew better than anyone; And since Jesus was the Son of God, he could have sinned if he chose to, because he had free will also.
Anyways... Jesus set the example not for us to be as good as he was, but for us to be better than we are (1 Peter 2: 21-23). So we can see ourselves on a mirror and know what our flaws are and what we need to do to have Jehovah's approval. Here's something that cheers me up:
John 16: 33: "I have said these things to you so that by means of me you may have peace. In the world you will have tribulation, but take courage! I have conquered the world." The part that says "take courage! I have conquered the world" gives me the impression that he is trying to say that since he could do it, so could we. His endurance had nothing to do with him being perfect but with him being loyal, and that we can be.
We don't believe the Holy Spirit is a person. Read Acts 2: 1-9. According to that text, we say it is Jehovah's active force or power. Jesus said it was a helper, not necessarily a person, right?
Whenever you can, try to explain to me how you make sense of the trinity and its implications in a logical way. Because I don't quite get it. I'm not challenging you or insulting you, I am really curious about a logical explanation about this matter from an unbiased source (Meaning you don't hate JWs... you'd realize now why many Christians hate us).