During World War II, CS Lewis, a veteran of the World War I trenches, preached a sermon to a (largely) university congregation in which he asked: can we really give ourselves to scholarship when there is a war on? (Learning in War-Time, 1939). 
He masterfully began by pointing out a more glaring question: can we really give ourselves to scholarship when there is a hell? His answer to both questions repays reading.
In light of recent events in Eastern Europe, many have started to look at Psalms that contain ‘imprecations’ (prayers against enemies) and to wonder whether it is possible to make use of them in Bible reading, prayer and even corporate worship. Such texts have always jarred with readers—they appear to be at significant odds with the ethics of the New Testament. You’re merrily reading the most beautiful Psalms, and suddenly the Dr Jekyll of song turns into a Mr Hyde of self- righteousness. Can we really use them in our Bible reading, our prayers and our worship?
I want to introduce that question by asking this question: should we really be doing something as other-worldly as Bible reading, prayer, even corporate worship, when there is a war on?
My answer is that Jesus, when we worship him (which includes reading his word and praying it back to him), teaches us certain attitudes and convictions. We cannot give ourselves properly to pressing global matters unless we continue to allow Jesus to cultivate that right state of our minds and hearts. If we want to serve him in the world, he needs to keep building us up in our worship of him. Let’s look at how that works with the Psalms more generally, before turning to imprecations.