The Bible is clear that God will judge us based on how we have judged others: "Do not judge, or you too will be judged. For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you" (Matthew 7:1-2). But how does one transform a judgmental heart into a kind and forgiving heart?
When we find that our hearts have somehow grown judgmental and harsh, it might be time again to spend some time in prayer. Whether we pray on our knees, sitting down or standing up, when we pray, we admit we can not do it on our own. This begins to let God break us away from our learned anger and ignorance.
It must be said that the ultimate goal of prayer is to connect with God and love, not to constantly "grovel" by beating ourselves up for past mistakes. A life of joyful forgiveness and reckless generosity is the goal. And this life is not lived in a self-degrading sort of manner, but in a confident demeanor from a spirit that is fully connected to and dependent on God through prayer and meditation: "So do not throw away your confidence; it will be richly rewarded" (Hebrews 10:35).
"I pray because I can’t help myself. I pray because I’m helpless. I pray because the need flows out of me all the time, waking and sleeping. It doesn’t change God, it changes me". -CS Lewis