I think this quote by George Matheson is perceptive insight and it speaks to a lot of religions and philosophies that promote meditation etc.

"My brother, do not say that the purpose of your prayer is to calm your mind! That is not the end; it is a beginning. If you have a calm mind you will come out in the open. Your Father's aim is not that you should enter into rest; it is that you should enter into movement. He offers you His peace, not to make you lie down in green pastures, but to make you walk in the paths of righteousness."