Prayer only works when the channels are open.
If our minds are stayed upon God, His peace will rule the affairs entertained by our minds. If, on the other hand, we allow our minds to dwell on the cares of this world, God's peace will be far from our thoughts.
Ultimately, all our complaints are directed against God.
When adultery walks in, everything worth having walks out.
When it comes to God's commands, the issue is not clarity; it's commitment.
Prayer is never complete until God has answered.