God did not make us robots to mindlessly love and obey Him. Instead He gave us a will and freedom of choice. But, like Adam, we often choose to disobey God and go our own selfish ways (read Genesis chapters 2-3). This side of our nature is called sin, and it separates us from God.

The Bible Says...

"For all have sinned and fall short of the glory of God...the wages of sin is death." Romans 3:23; 6:23

"So [after Adam sinned] the LORD God banished him from the Garden of Eden...." Genesis 3:23a

"But your iniquities have separated you from your God; and your sins have hidden His face from you, so that He will not hear." Isaiah 59:2

Our sin separates us from God.