This document discusses da'wah (outreach/invitation) to atheists, deists, and agnostics. It begins by defining these terms and noting that belief in God's existence is logical according to ancient philosophers like Plato and Aristotle. It then discusses several arguments for God's existence, including that design indicates a designer, the complexity of living things cannot be explained by chance, and that belief in God is part of human fitrah (natural disposition). The document aims to convince non-believers through reason and argues that atheism and Darwinism fail to provide satisfactory explanations for the origin and purpose of life.