You must realize first of all that you are the proof of everything, including yourself. None can prove your existence, because his existence must be confirmed by you first. Your being and knowing you owe nobody. Remember, you are entirely on your own. You do not come from somewhere, you do not go anywhere. You are timeless being and awareness.
Sri Nisargadatta MaharajA quiet mind is all you need. All else will happen rightly, once your mind is quiet.
Sri Nisargadatta MaharajDo what you believe in and believe in what you do. The rest is a waste of time and energy.
Sri Nisargadatta MaharajYou begin by letting thoughts flow and watching them. The very observation slows down the mind till it stops altogether. Once the mind is quiet, keep it quiet. Don't get bored with peace, be in it, go deeper into it.
Sri Nisargadatta MaharajJust keep in mind the feeling 'I am', merge in it, till your mind and feeling become one. By repeated attempts you will stumble on the right balance of attention and affection and your mind will be firmly established in the thought-feeling 'I am'. Whatever you think, say, or do, this sense of immutable and affectionate being remains as the ever-present background of the mind.
Sri Nisargadatta Maharaj