"The light of nature shows that there is a God, who hath lordship and sovereignty over all, is good, and doth good unto all, and is therefore to be feared, loved, praised, called upon, trusted in, and served, with all the heart, and with all the soul, and with all the might. But the acceptable way of worshiping the true God is instituted by Himself, and so limited by His own revealed will, that He may not be worshiped according to the imaginations and devices of men, or the suggestions of Satan, under any visible representation, or any other way not prescribed in the holy Scripture." (The Westminster Confession of Faith, 21.1)
The message of Christianity is a simple one. It is a message of God's plan to save sinners and give them eternal life through faith in the person and work of Jesus Christ. Are you certain that if you died today you would spend eternity in heaven?