How do we know that David was chosen by God?

The evidence of David being God's chosen king is found in 1 Samuel 16:13, where Samuel anoints David, saying, 'The Spirit of the Lord came upon David from that day forward.' This act of anointing was significant as it signified God's appointing of David as leader over His people, Israel. David's anointing in secret reflects God's sovereign choice, independent of human reasoning or societal expectations. Throughout his life, David displayed a heart after God's own, further substantiating his selection. The transformative work of the Holy Spirit in David's life highlights that his kingly role was divinely ordained and equipped by God, thus underscoring the truth of God's sovereignty in the affairs of men.