Here is an attempt to candidly offer some of the reasons which suggest that God exists. Before you look at the facts surrounding God's existence, ask yourself, "If God does exist, would I want to know Him?" Here then are some reasons to consider.
Does God exist? The complexity of our planet points to a deliberate Designer (God) who not only created our universe but sustains it today.
The earth... its size is perfect. The earth's size and corresponding gravity holds a layer of mostly nitrogen and oxygen gasses, extending about 50 miles above the earth's surface. If earth were smaller, an atmosphere would be impossible, like the planet Mercury.
If earth were larger, its atmosphere would certainly contain free hydrogen, like Jupiter. Earth is the only known planet equipped with an atmosphere of the right mixture of gasses to sustain plant, animal and human life.
The earth is located at the right distance from the sun. If the Earth were any further away from the sun, we would all freeze. Any closer and we would burn up. The earth remains this perfect distance from the sun while it rotates around the sun at a speed of nearly 67,000 mph. It is also rotating on its own axis, allowing the entire surface of the earth to be properly warmed and cooled every day.
The moon. Our moon is the perfect size and distance from the earth for its gravitational pull. It creates important ocean tides and movement so ocean waters do not stagnate, and yet our massive oceans are restrained from spilling over across the continents.
Water. No living thing can survive without water. Plants, animals and human beings consist mostly of water. It has an unusually high boiling point and freezing point. Water allows us to live in an environment of fluctuating temperature changes, while keeping our bodies a steady 98.6 degrees. Water is a universal solvent. It is chemically neutral.
It has a unique surface tension and can flow upwards bringing nutrients to the top of very tall trees. When water freezes, it floats and fish can live in the winter.
The human brain....processes an amazing amount of information: colours, temperatures around us, objects we see, the sounds we hear, emotions, thoughts and memories, the ongoing functions of our body, the ability to reason, to plan, to take actions and to relate to other people.
God does not force us to believe, though he could. Instead He had provided sufficient proof of His existence for us to willingly respond to Him. The earth's perfect distance from the sun, the moon, the unique chemical properties of water, the human brain, all these and much more attest us to knowing God. These proofs make us believe that God exists.