The question is vital. Left to ourselves we are totally ignorant of God. Can you search out the deep things of God? Can you find out the limits of the Almighty? (Job 11:7) God is beyond our understanding and we need Him to reveal Himself to us. Creation is one of the main ways in which He does so.
The heavens declare the glory of God, and the firmament shows His handiwork (Psalm 19:1).
The sheer size of the universe and its amazing balance, variety, and beauty reveal a great deal about the God Who made it. In creation God shows His stupendous power, awesome intelligence, and brilliant imagination.
For since the creation of the world His invisible attributes are clearly seen, — being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse (Romans 1:20).
When we communicate with one another we rely heavily on words. God also speaks to men through words — the words of the Bible. Nearly 4,000 times in the Old Testament alone (500 times in the first five books) you will find phrases like ‘the Lord spoke,’ ‘the Lord commanded,’ and ‘the Lord said.’ This is why it is claimed that Scripture never came about by the will of man, but holy men of God spoke as they were moved by the Holy Spirit (2 Peter 1:21).
In no other literature can we find scores of clear and detailed prophecies made by men claiming to speak from God, and later fulfilled to the letter. The odds against this happening by chance are too vast to be taken seriously.
Then there is the Bible’s impact on people’s lives. No other book has had such a life-changing power. Millions of people, over thousands of years, have proved by personal experience that the law of the Lord is perfect, converting the soul; the testimony of the Lord is sure, making wise the simple; the statutes of the Lord are right, rejoicing the heart; the command of the Lord is pure, enlightening the eyes (Psalm 19:7-8).
After 2,000 years no expert in any field has ever disproved a single statement in the Bible. [If you have serious questions about the Bible read Nothing but the Truth, by Brian Edwards (Evangelical Press).]