Why is desiring God's word necessary for believers?

According to 1 Peter 2:2, as newborn babes desire pure spiritual milk, so too should believers crave the Word of God. This desire signifies genuine spiritual life bestowed through the new birth, where God changes the heart and instills a longing for righteousness and truth. It is essential because the Word equips Christians to grow in grace and knowledge, enables understanding of God's will, and strengthens faith. If believers lack this desire, it raises questions about the authenticity of their spiritual life and the work of God within them.