Boaz leads us through Matthew 7:1-12, where Jesus points out the reality that we all judge others and feel good about it, yet expect others not to judge us. Jesus shows us that in reality, He is the one who in his perfection has every right to judge us, yet gives us unlimited grace despite our sin and dies for us instead. Therefore rather than pointing out other people's sins, Boaz discusses how we should examine our own shortcomings and come to God with them. When we see our own shortcomings, we can realise our need for Christ and his grace, which changes our heart and helps us to reflect Christ's love towards others rather than judge them (which is a way of trying to be God ourselves).
