How do we know Christ provides for our spiritual needs?

In Philippians 4:19, the supply mentioned includes not only our physical necessities but also our spiritual well-being. Paul highlights that his desire is for their spiritual fruit to abound (Philippians 4:17), indicating that their support for him was also a spiritual act pleasing to God. Furthermore, Jesus identifies Himself as the ultimate source of life and sustenance, calling Himself the 'bread of life' (John 6:35). Thus, through faith in Christ, believers receive all that is necessary for their salvation and spiritual growth from the Father's hand.