What defines true love according to the Bible?

The Bible defines true love through the lens of God's actions, particularly the sending of His Son as an atoning sacrifice for humanity. In 1 John 4:9, it states that this is how God showed His love among us: He sent His one and only Son into the world that we might live through Him. This selfless act exemplifies that love is not merely an emotion or sentiment but a commitment to seek the wellbeing of others, even at a great cost. The ultimate expression of love is sacrificial and seeks to uplift, nurture, and redeem, reflecting the heart of God’s relationship with His people.