But you know there is no God? For this you have proof?
I know when to say "I don't know" as well. As an engineer and a scientist I thrive in that condition. I constantly live at the edge of the unknown, that is why I study physics.
For 25 years I said "I don't know" about God. I was a half-hearted deist, bordering on the atheist.
2 years ago I learned something profound. Not only is God real but Jesus Christ is indeed the Son of God. I learned this absolutely when I, as an experiment, asked Christ to show me He was real, and come into my heart. boom. I did not expect what happened. Nor did my wife who is/was a jewish mathematician. She broke down in tears, she had a real epiphany. The power/force/passion that erupted in us so suddenly with those words was profound for us.
Christ is as real as gravity. God does reveal Himself to those who would see, or just ask.
I suggest you ask. It cannot hurt and it can do you an eternity of good. (It is in fact illogical to not ask Christ into your life, as Charles Babbage said)