Can repentance be defined as simply feeling sorry for sin?

Repentance cannot be reduced to mere sorrow for sin; it encompasses a complete transformation of thought regarding one's sin and relationship to God. As highlighted in Luke 15, true repentance recognizes our unworthiness and seeks reconciliation with God. The son's confession demonstrates this change—he acknowledges his sin against God and his father, leading him to return seeking mercy rather than demanding rights. Genuine repentance involves a heartfelt turning away from sin and a desire to embrace God's grace, marking the beginning of a renewed life in Christ.