How do I know God exists? You may not be asking this question. However, someone may ask you. We need to be prepared to respond.
Does the Bible specifically address the existence of God? There are many that say no. We can present many scriptures in the Bible. Such as…
“Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel (God with us).” Isaiah 7:14
Jesus proclaimed He was God, ‘Jesus said unto them, Verily, verily, I say unto you, Before Abraham was, I am.’ John 8:58. “I am is the name God gave to Himself in Exodus
“In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men.” John 1:1-4
When we look at the Earth and existence of it we can proclaim God exists, “The heavens declare the glory of God (manifested presence); and the firmament sheweth his handywork. Day unto day uttereth speech, and night unto night sheweth knowledge. There is no speech nor language, where their voice is not heard. Their line is gone out through all the earth, and their words to the end of the world. In them hath he set a tabernacle for the sun, Which is as a bridegroom coming out of his chamber, and rejoiceth as a strong man to run a race. His going forth is from the end of the heaven, and his circuit unto the ends of it: and there is nothing hid from the heat thereof.” Psalm 19:1-6