Peace,
You want clear solid proof for the Trinity?
You need to check my thread out.
http://www.jesus-christ-forums.com/home/viewtopic.php?t=2992
The Holy Spirit is proof of the Trinity.
He's not a man, or angel, but God's divine Spirit, the third person of the Trinity.
This wasn't some borrowed philosophy considering the Spirit played a big role back in Moses's time!