Can you then theistically PROOF any of God's characteristics?
That is a question asked by a person with no concept of what God MUST be.
Look, forget your idea of God for a moment, He is not some uber-powerful being with a white beard floating around in the cosmos on a throne.
Try to grasp this:
God doesn't exist, He IS existence.
This is not an opinion but a pure statement of deductive reasoning.
As creator and sustainer ( The Uncaused cause of all that is caused and the unmoved mover of all that moves/changes) of all the exists, God MUST be the following:
All Powerful ( because He is pure actuality)
All Knowing ( Because He is not bound by "time" He knows all -past, present and future)
All loving ( There can be no hate in God because that would make Him lacking someting, ie: love, so He can't be God)
All present ( because He is the Uncaused first cause and the unmoved mover He must be everywhere at every time).
These are things that God MUST be if He is God and He is God because there is existence.