define god.
god is a word that is filled with personification. we give god attributes like the ability to act and create ("god created us"), but these attributes are hard to make sense of when we also "define" god to be an omniscient substance outside of time that does not need to create; for, with god, all must exist in its eternal present, like frames of a film that are displayed all at once.
if it so came to happen that god decided to create, does this not imply that god is subject to the linear passage of time: god exists before creation (past), god exists with creation (present), and god exists after creation (future). that is what is implied by giving god the ability to create, but this is contrary to the claim that god is omnipresent.
but if we take away the idea that god is within time, we take away most of what defines ourselves. god does not desire, create, destroy, as these ideas all depend on the notion of time. if we want to give god attributes like creator or miracle worker or healer, we have to redefine what we mean by god.
therefore, when asked what would be necessary for the proof of god's existence, i struggle enough with the definition of god, no less what would be considered a proof. if we define god as something that is everything and timeless, then existence itself, and the mere fact that i know i exist, are enough proof for me to know that "god" exists. i don't think anyone could argue with this fact; but i think many people could argue about my definition of god. god is a sentient being that created the world, they say; but, for me, god as a sentient being is contrary to what is necessary for god to be god.
but then again, i sometimes am amazed that i exist at all. contemplate the idea of nothing. consider a state in which there is no world, no universe, no time. absoute nothing. in this state, nothing would always be nothing. there never was and never will be a something. this idea of nothing can bring me to my knees if i think too much about it. therefore i resolve that there always must be something; that there never could have been nothing. and this idea of there always being something, timeless, correlates with my own definition of god.
sorry for the ramble