Whenever you ask a "why" question, you are asking a question of purpose.
So far in this "Who Is God" series, we have looked at evidence that there is a God, what kind of God He is, and what kind of relationship we should have with Him. Today we will discuss the purpose God has given to each of us, because as limited/created objects, we must receive our purpose from our Designer.
1. Without God we have no meaningful purpose. 1 Corinthians 1:26-27
You can give yourself a purpose, but it won't be a meaningful purpose that is in line with your design. Do you understand every detail of your nervous system or exactly how it controls your body? Do you understand the impact that having pre-marital sex will have on your soul? Do you understand how your hatred of another will impact you in eternity?
Of course, none of us can fully understand all the aspects of ourselves in any capacity-mental, physical, spiritual, or emotional. How then can we decide the purpose for what each should be used?
For you see your calling, brethren, that not many wise according to the flesh, not many mighty, not many noble, are called. But God has chosen the foolish things of the world to put to shame the wise, and God has chosen the weak things of the world to put to shame the things which are mighty. 1 Corinthians 1:26-27
God chose you, as limited as you are, to do something way above your capacity. His ways are not our ways.
2. Our purpose is to fulfill the intent of our design. 1 Corinthians 12:14-31
Now you are the body of Christ, and members individually. And God has appointed these in the church: first apostles, second prophets, third teachers, after that miracles, then gifts of healings, helps, administrations, varieties of tongues. 1 Corinthians 12:27-28
God gives each of us the ability to do different things to edify the church, serve, and bring glory to God. Just as a clock doesn't have to worry about broadcasting cable channels, you don't have to worry about doing things for which you were not designed.
God has created you to do something! Your job is to find out what that is and do it. Of course, because God has given us freedom, we can choose to ignore Him. But if we ignore him, we never experience the fulfillment that comes with realizing our true purpose.
3. The intent of our design is to eternally glorify our Designer. 1 Corinthians 1:29-31
No matter how good you are at what you do, you must always remember that it's about God, not about you. For example, if you are an amazing athlete, your abilities are not just for you to enjoy glory or for your team to gain recognition. Your gifts have a much higher purpose that only God knows and only God can make them come to fruition. By surrendering yourself to Him, you can bring Him glory by allowing His purposes to come to light.
Therefore, whether you eat or drink, or whatever you do, do all to the glory of God. 1 Corinthians 10:31
4. Our purpose can only be fulfilled through a dependent relationship with our Designer. 1 Corinthians 1:30-31; John 15:5
Your purpose can only be fulfilled in the context of a relationship with your Designer because we don't understand everything there is to know about ourselves-mentally, physically, emotionally, and spiritually. (In fact, we understand very little.)
When you choose to run your own life and fulfill your own purposes, this is like taking your dad's brand new Mercedes and putting water in the tank because you think gas is too expensive. Of course, this ruins the car because only the car's designer can dictate how to care for it and keep it running properly. Doing it your own way leads to death.
I am the true vine, and My Father is the vinedresser. Every branch in Me that does not bear fruit He takes away; and every branch that bears fruit He prunes, that it may bear more fruit. You are already clean because of the word which I have spoken to you. Abide in Me, and I in you. As the branch cannot bear fruit of itself, unless it abides in the vine, neither can you, unless you abide in Me. I am the vine, you are the branches. He who abides in Me, and I in him, bears much fruit; for without Me you can do nothing. John 15:1-5
When you give your life to Jesus, you are opening up the possibility to realize all the potential of your design. He made you, loves you, and knows you better than anybody on earth does, including you.