I know there is a God because people have a soul and a spirit. Animals breath,live and have instinct but people are unique in having a soul and a spirit that gives us intellect, imagination, feelings and the ability to decide.
We are rational beings, given even the ability to decide whether or not to believe in a Supreme Being; that is free will and only man has it.
"And Jehovah God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul."
Thank you, Deborah for believing in the Soul.