It's not just important, it's everything. We're talking about the key to everything in life. Jesus says in John 6 that he is the "bread of life." What he is saying is that if anyone wants to have true life he has to be transformed and filled with the essence of who Jesus is.

Knowing God is really everything in life. God created us to have a relationship with him and in that relationship is every joy and pleasure. To be alive physically and not to have relationship with God is like Michael Phelps sewing instead of swimming, it's like Kobe spending his life giving manicures instead of playing basketball. That would be ridiculous and a waste. True fulfillment comes in doing what one was made for - and God made us to be in a relationship with him. Of course, these metaphors are weak because not being in a relationship with God is also a living death.

If what the Bible says is true, it effects you immensely, because it says that everything beautiful and good are found through the forgiveness that comes through the sacrifice that his Son made. Jesus Christ came to pay the price that was required of each man - the penalty for sin: death. Now by coming to him, one can not only experience forgiveness for sins and deliverance from hell, but can experience the fullness of joy in him.

This is very, very important. I hope you can experience it. :)