What is meant by 'one thing is needful' in Luke 10?

'One thing is needful' is a critical teaching found in Luke 10:42, where Jesus emphasizes that the most important aspect of life is not relegated to our various duties or concerns but rather to hearing and understanding His word. Jesus highlights that Mary chose the good part, which will not be taken away from her. This underscores the idea that spiritual communion with Christ and attentiveness to His instruction is the foundation of a fruitful Christian life. Everything else pales in comparison, as our relationship with Him is eternal and life-giving.