Guernica, Pablo Picasso’s most important political painting, was a modernist portrayal of the 1937 destruction of a small Spanish town by that name. During the Spanish revolution and the ramp-up to World War II, Nazi Germany’s planes were permitted by Spain’s Nationalist forces to use the town for bombing practice. These controversial bombings took scores of lives, drawing the attention of a global community concerned over the immorality of bombing civilian targets. Picasso’s painting captured (and horrified) the imaginations of the watching world and became a catalyst for debate about humanity’s seemingly endless capacity to destroy one another.

For those of us who feel confident that we would never intentionally shed blood, we should remember Jesus’ words, “You have heard that it was said to the people long ago, ‘You shall not murder, and anyone who murders will be subject to judgment.’ But I tell you that anyone who is angry with a brother or sister will be subject to judgment” (Matthew 5:21–22). The heart can be murderous without ever actually committing murder.

The issues of the heart are always bubbling under the surface of our actions. When unchecked anger toward others threatens to consume us, we desperately need the Holy Spirit to fill and control our hearts so that our human tendencies can be replaced by the fruit of the Spirit (Galatians 5:19–23). Then love, joy, and peace can mark our relationships.