We are spiritual beings. We are not animals whose existence is fulfilled simply by satisfying physical instincts. There is a desire embedded deep within to find meaning to life beyond just eating and drinking and working and dying.
That
something is actually
someone -
Jesus Christ.
Only a friendship with God can satisfy this basic need. Our problem is that we are separated from him so the relationship is broken before it even begins.
Consequently, in our life a gap appears. Then we try to replace God with other things:- ambition, money, drugs, alcohol, education, career, music, sport, etc
Some of these things are good. Some are not. But whether good or evil, we cannot find what we're searching for because what's missing is spiritual - not physical - not intellectual either. Finally, our present separation from God becomes a permanent separation forever. This is worse than death, and nothing can reverse it. That is why Jesus came.
The following verses from the Bible, and "the bridge" illustration, show God's part and ours in mending this relationship: