A guy named Narendra was seized of this question and he wandered here and there and asked so many spiritual and religious authorities. No one could satisfy his curiosity about this baffling phenomenon called God. At last he came face to face Sri RAMKRISHNA PARAMHANS, an highly enlightened soul and asked him whether he saw God. The saint replied," I see God as I see you". it is a history that the saint answered all curious questions arising in the mind of inquisitive, intellectual and somewhat sceptic young man. All this and more you can find in the biography of the saint- Gospel of Sri RAMKRISHNA PARAMHANS. Am sure you would have definitely read this book. Though the saint has succeeded in seeing God and talking to Him in various forms as he wished, even he has admitted that such kind of feat is possible if the mind searches God in right earnest and then only mind creates impossible miracle that is vision of God in the forms as a devotee wishes them. It is said of the saint that he used to see Mother Kali ( or vision of mother ? ) when he worshipped her in the temple. Sri RAMKRISHNA PARAMHANS also meditated upon formless God or Parbrahman. He justified both, God in form and God as formless,pure Brahman. Also, nobody can convince a person verbally, it is a self experience that one must strive to attain himself if one is so dead serious. As regards invisibility of God, I am of the view that all emotions such as love, kindness, affection. hate, envy, anger,greed,revenge and so on can be felt in the mind only and through observation of our body expressions only, we can have truthfulness of existence of these but these cannot be seen visually in their full appearance. Nonetheless, we can not rule out their existence. We can assume these as abstract things and not as tangible things such as table, car, house,window,body,earth,tree and so on that are too apparent to our sight and about their existence we are so dead sure that we can not deny their existence. So, like every abstract thing in the mind, God is also an abstract thing that can be seen and felt in our expression only and the most highly evolved expression is termed as the vision of God. Irony is that we admit so many abstract things daily as mentioned above and never think these to appear in tangible forms but the Master of all abstracts things,ideas and all tangible things is not accepted to us in abstract form, we insist on Him to come into tangible form though Hindus accept some avatars as tangible forms.