What is 'love your neighbor' from?

The directive to 'love your neighbor' originates in the Old Testament, specifically within the Mosaic Law given to Israel through Moses on Mount Sinai. It is explicitly stated in Leviticus 19:18: "You shall not take vengeance, nor bear any grudge against the children of your people; but you shall love your neighbor as yourself. I am Yahweh." This commandment is presented as a cornerstone of ethical and communal living within the covenant people, emphasizing reconciliation, forgiveness, and an outward orientation of care mirroring one's self-love. It is not merely a social nicety but a divine injunction, foundational to Israel's identity and relationship with God. In the New Testament, Jesus Christ affirmed and elevated this commandment, identifying it as the second of the two greatest commandments, inseparable from the first: to love God. When asked about the greatest commandment, Jesus quoted both Deuteronomy 6:5 ("You shall love Yahweh your God with all your heart, and with all your soul, and with all your might") and Leviticus 19:18, stating in Matthew 22:39, "A second likewise is this, ‘You shall love your neighbor as yourself.’" He elaborated on the profound implications of 'love your neighbor' through teachings such as the Parable of the Good Samaritan (Luke 10:25-37), demonstrating that a 'neighbor' extends beyond one's immediate community or ethnic group to anyone in need, even a traditional enemy. The Apostle Paul further reinforces this, asserting in Romans 13:9-10 that loving one's neighbor fulfills the entire law, as love "works no ill to his neighbor. Therefore love is the fulfillment of the law."

The commandment 'love your neighbor' was given within the socio-legal framework of ancient Israel, established after their Exodus from Egypt (circa 13th-15th century BCE). The Mosaic Law, codified in the Pentateuch, provided a comprehensive system for governing religious worship, civil justice, and social ethics for the nascent nation. In a society that often favored retributive justice (lex talionis), the injunction against vengeance and grudges, coupled with the command to love, introduced a radical ethical standard for intra-community relations. The 'neighbor' (רֵעַ, re'a) originally referred primarily to fellow Israelites or resident aliens who dwelled among them, signifying a covenantal bond. During the Second Temple period (539 BCE - 70 CE), and especially in the time of Jesus, interpretations of 'neighbor' varied among Jewish sects. Some, like the Essenes, might have narrowed its application, while others, like certain Pharisaic schools, might have held broader views. Jesus's teachings, particularly the Parable of the Good Samaritan, significantly expanded the understanding of 'neighbor' beyond ethnic or religious affiliation to encompass universal humanity and anyone in need, challenging prevailing ethnocentric biases and calling for a radical, unconditional compassion.

The commandment to 'love your neighbor as yourself' is more than a moral maxim; it is a profound theological statement reflecting the character of God and serving as a practical expression of one's love for Him. By commanding humans to love their neighbor, God calls them to emulate His own benevolent nature, which extends grace and mercy. This command, linked directly to loving God with all one's being, encapsulates the entire ethical framework of the biblical revelation. It demands an impartial, active, and sacrificial care for others, revealing that genuine spirituality is not solely vertical (Godward) but also horizontal (manward). As human beings are made in God's image, loving them is, in a sense, honoring God Himself. Jesus's elevation and expansion of this commandment underscore its centrality in the New Covenant, moving from a covenantal boundary marker to a universal ethic of self-sacrificial love (agape) that defines discipleship and the Kingdom of God.