When your heart is heavy and thanks seems buried beneath sorrow:
“Do not say, ‘But it is hypocritical to thank God with my tongue when I don’t feel thankful in my heart.’
There is such a thing as hypocritical thanksgiving: Its aim is to conceal ingratitude and get the praise of men. That is not your aim.
Your aim in loosing your tongue with words of gratitude is that God would be merciful and fill your words with the emotion of true gratitude. You are not seeking the praise of men; you are seeking the mercy of God. You are not hiding the hardness of ingratitude, but hoping for the in-breaking of the Spirit.” (John Piper, When the Darkness Will Not Lift)