In this teaching, Jesus highlights the impartial nature of God's love and provision. The sun and rain, essential for life and growth, are given freely to everyone, regardless of their moral standing. This reflects God's grace and generosity, which are not limited by human distinctions of good and evil. By emphasizing this point, Jesus calls His followers to adopt a similar attitude of love and kindness toward all people, even those who may not seem deserving by human standards.
The idea is to transcend the natural human inclination to favor those who are like us or who treat us well. Instead, we are encouraged to love universally, just as God does. This approach not only aligns us with God's character but also fosters a more compassionate and harmonious world. By loving our enemies and those who may not reciprocate our kindness, we become true children of God, reflecting His unconditional love and mercy in our interactions with others.