The Bible, first book first chapter, tells us that God created people in his own image with the capacity to experience love and relationship. God did not create robots who would automatically love God and follow his instructions, but God gave humans free will -- the opportunity to love and worship God and, at the same time, freedom to reject God.
Chapter three of Genesis tells how the first humans chose to do life their own way instead of God's way. Adam and Eve rebelled against God and sinned. The Bible tells us in Romans 3:23, however, that all have sinned and fall short of the glory of God. Because God is holy and cannot tolerate evil, our sin has separated us from God.
Through the centuries, people have tried to find God by doing good things and performing religious rituals, but no amount of human effort has resulted in human beings finding God on their own. God, however, made a plan to restore relationship with his people. John 3:16 says, For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.
The Bible tells us that Jesus was fully God and yet, at the same time, fully human. Because Jesus was fully God, he was sinless. Because Jesus was fully human, he could die for (pay the punishment for) the sins of the world on the cross. When Jesus died on the cross and arose from the grave, Jesus conquered sin and death for all time.
It is through the life, death and resurrection of Jesus that God opened the way for us -- and all of humanity -- to connect with him. John 14:6 says, Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me."