I really don't know why I'm agnostic.
An agnostic is a person who feels that God's existence can neither be proved nor disproved on the basis of current evidence. An agnostic's lack of decisiveness is generally the result of doubt.
The Bible states that anyone who who rejects Christ will be lost. Because we are born into sin, it important for agnostics to resolve the problems they have with God's existence.
If you visit the ruins of any number of ancient civilizations, you will find the concept of a Supreme Being has long been very popular. Even in our age of technical advancement, most people are convinced that there is a god who watches over them. Given the abundance of evidence in nature, faith is reasonable. That is why the psalmist declared: “The fool hath said in his heart, There is no God” (Psalm 14:1).