The parable of the Unjust Judge (Luke 18:1-8) is an encouraging parable but a rather tricky one. Encouraging because we're encouraged to persevere in prayer - God hears us and we're told will not delay in answering our prayers. However it's tricky because of the word translated 'quickly' in verse 18. However this word is sometimes translated 'certainly' or 'surely' and so the emphasis is not so much on the speed of God's response but rather the certainty that God will ultimately overcome evil with good. So we must think through the implications of why God appears to be slow in addressing the evil we see in the world. Atheism's answer turns out to be too simple whereas Christianity's answer centers around Christ's death on the cross.