Bitterness towards God begins to fester when we look at Him as the enemy instead of the Answer, when we blame Him for our suffering instead of looking to Him for comfort in it.
It grows when we take our griefs and hold them against God, as if He's committed an unforgivable offense. As if He's sinned against us. As if it's His fault that we are miserable.
Instead of pushing us to the Savior, we let our pain become a wedge between us and the Lord. And as a result, we find ourselves without the fellowship, peace, joy or comfort that we so desperately need during the hard times, for we have obstructed the way to those things, we have blocked our connection to Jesus.
A bitter heart would rather die a slow inward death as its wounds bleed out, than to humbly go to the Physician.
A bitter attitude toward God is contention towards Him. And do you know what brings contention? Pride. "Only by pride cometh contention." Proverbs 13:10 Pride locks you into a prison of bitterness, and only humility will be able to get you out. If you want to be free of your bitter, broken spirit and be able to be comforted by the God who loves you, then you will have to humble yourself and repent of your pridefulness.
For me this sometimes looks like telling Jesus,"I don't like what you're allowing in my life right now, I don't agree with it, but I know that you are right and I am wrong. I am a worm, and you are the Eternal Wise God. You know better than I."
Come to God in humility, and let Him remove the bitterness that is cutting the connection to your Lifeline. You need His love, comfort, peace and joy in your affliction. He cares about your suffering so much, that He entered into it Himself. He bore the ultimate suffering when He was forsaken by the Father as He hung on the cross. He was forsaken so that you would never have to be.
God is the answer to your pain, not the cause. And He is lovingly waiting to be your comfort in your time of affliction, if you will only bring the hurt to Him. "God is our refuge and strength, a very present help in trouble." Psalm 46:1
Let your pain push you to Jesus, not away from Him.
Amen! This brings it perfectly to the point. We need to humble ourselves before the Lord and not accuse Him.