3 in 1?

One attribute of God that is very interesting but very difficult to understand is the triune nature of God. We Christians believe in the Trinity, God the Father, Christ the Son, and the Holy Spirit. It is something very hard to comprehend, one God who exists in 3 persons. Also it is not easy to defend since the word "Trinity" is not explicitly written on the bible. So many other religions and cults usually criticize the doctrine of the Trinity.

I am no expert in this subject, but if you're interested in knowing more, I recommend the following sermon by Mark Driscoll from the doctrine series: Trinity - God is

I kinda like analogies, so I want to use one here to explain the little I understand about the Trinity. You can see a simple circuit in series:
- V = voltage of the power source
- I = current flowing in the circuit
- R = resistance

So God is the perfect infinite power source, all powerful and infinite! Jesus is the way to the Father (John 14:6), so in this case the wire that connects the power source to the resistor, that path is Jesus. It is only through Jesus that we have access to the Father. As Christians, we believe in the indwelling of the Holy Spirit, which is when the Holy Spirit enters in us and transforms us. So the current that flow through the resistor, is the Holy Spirit. As expected, the believer is the resistor, because we naturally tend to resist to what the Spirit desires. 

For every believer, we want God to increase, and we should decrease (John 3:30). In the same way, the resistance should go downs so that the current increases (according to Ohm's Law, V = IR). We need to let the Holy Spirit fill our lives, while letting our old ways behind. As the current increases, the power (P = VI = RI^2) will increase in a quadratic fashion. When the Spirit is at work in us, it's true power:

"Now to him who is able to do immeasurably more than all we ask or imagine, according to his power that is at work within us, to him be glory in the church and in Christ Jesus throughout all generations, for ever and ever! Amen." - Ephesians 3:20-21 

I am an electrical engineer from Waterloo after all.