I've already covered the absurdity that is demanding that God do our bidding, to jump through whatever hoops, sacrifice whatever dignity, just to prove His existence.
God's existence is not the question of greatest import. Our relationship to Him is. Or to put another way, He doesn't merely want us to know that He is, He wants us to know what He is, and what that means about us.
His goal for us is not to have us quailing in fear and awe before Him, nor to have us simply learn to play nice-nice with each other.
The plan is for us, or as many as will, to know Him. And the best, indeed, the only way to know God is to practice His way of life. Walk not just an extra mile but a lifetime in His moccasins, as it were.
Knowing God is the same as becoming like Him, and vice versa.
1 Jn 3:2; Moro. 7:48 - see him, pure as he is pure
We do well to pray in meekness and humility before Him, ofttimes upon our knees.
The way to see God is laid out plainly by those who have had the privilege. Indeed, the pattern is given by God himself.
Blessed are the pure in heart, for they shall see God.
These are not idle words of a lunatic, or the musings of a detached philosopher. This is the emphatic and literal promise from the Son of God himself. If anybody should know how to get a face-to-face with the Lord of the Universe, it would be Him.
If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him.
Some teach this to be an allegory, but it is not. It is neither allegory nor hyperbole nor anything but a plain statement of literal fact, as true as observing that the sun will rise in the east tomorrow.
He has made it even more plain in modern revelation:
Verily, thus saith the Lord: It shall come to pass that every soul who [1] forsaketh his sins and [2] cometh unto me, and [3] calleth on my name, and [4] obeyeth my voice, and [5] keepeth my commandments, shall see my face and know that I am. (D&C 93:1, emphasis and numbering mine)
The key is changing ourselves, making ourselves better---making ourselves more like Him, by His grace and with His coaching. We come to Him; we do not insist that He come to us, unless we are like the insomniac dyslexic agnostic who stays awake at night wondering if there really is a Dog.
We don't get to set the terms. Again, the Lord has made it clear that
if your eye be single to my glory, your whole bodies shall be filled with light, and there shall be no darkness in you; and that body which is filled with light comprehendeth all things.
"Therefore," He continues, "sanctify yourselves that your minds become single to God"---there's the purity theme again---"and the days [note the plural; this is an ongoing, intimate relationship He's promising] will come that you shall see him; for he will unveil his face unto you, and it shall be in his own time, and in his own way, and according to his own will." (D&C 88:67)