Biblical Answer

Step 1: Understanding God's Purpose for Humanity

God's purpose for humanity is to glorify Him and to enjoy Him forever. This is the fundamental distinguishing characteristic shared by all humanity. God made humans able to know Him and respond to Him, and this is the ultimate goal of human existence.

Step 2: Recognizing God's Sovereignty

God is sovereign over all things, working all things after the counsel of His will. This means that His purpose for humanity is not just to make us beautiful, plump grapes, but to make us grapes so that He may squeeze the sweetness out of us. Our purpose in life is to fulfill the reason that God created us: to glorify Him.

Step 3: Embracing God's Purpose in Our Lives

When we understand God's purpose for us, we are freed to hate and exterminate the evil in ourselves and to sacrifice our own rights and even our own welfare for others. We are no longer striving to find out what His purposes are, but rather, we are trusting in Him to accomplish all that He intends in His overarching purposes, despite our limited understanding. Our purpose is not to display success in Christian work, but to display the glory of God in human life, to live a life hidden with Christ in God in our everyday human conditions.

The final answer is: $\boxed{To glorify God and enjoy Him forever.}$

Note: The answer is a summary of the main idea presented in the text, which is that God's purpose for humanity is to glorify Him and enjoy Him forever. This is the ultimate goal of human existence, and it is the foundation for understanding our purpose in life.