Love must always take concrete form. God did not withhold himself, but in the Son he was heard, seen, and touched. Fellow humans likewise must exhibit a concrete reality so as to be heard, seen, and touched.
Life Together: The Heart of Love & Fellowship in 1 John by Thomas Olbricht (Covenant Publishing, 2006); p.98
The OT … is more than the factual base out of which the NT is to be understood. The earliest Christians understood the OT as the very basis for achieving a proper relationship with God. …
Though the institutions of the OT have passed away, the theology of the OT remains. In fact, on it is built the theology of the NT. …
The church today suffers malnutrition if a part of its diet is not the theology of the OT.
Thomas Olbricht in The World and Literature of the Old Testament edited by John T. Willis (Sweet Publishing, 1979); pp.344-345