There can be no bigger question. Why? It influences what we believe and therefore how we live now; moreover, it will determine where we spend eternity hereafter.
The above question is the tip of a very large philosophical iceberg, and in order to answer it we will need first of all to explore its base.
The Bible teaches that the way to a relationship with God comes only through the Son of God, the Lord Jesus Christ.
In order for anyone to come to God, the barrier of sin must be removed. Since the only person able to remove that barrier is the Lord Jesus Christ, He is the only way to God.