Only God is to be loved for His own sake. Everything else is to be loved for God's sake.
Peter KreeftThere is no effective rational answer to the challenge: "But give me a reason why I should love someone who does not deserve it." Love is the highest thing. There can be no higher reason to justify it.
Peter KreeftTo many moderns, [love] is something that is only a part of us rather than something of which we are a part.
Peter KreeftTrusting God's grace means trusting God's love for us rather than our love for God. [...] Therefore our prayers should consist mainly of rousing our awareness of God's love for us rather than trying to rouse God's awareness of our love for him, like the priests of Baal on Mount Carmel (1 Kings 18:26-29).
Peter Kreeft