Our obedience is God's pleasure when it proves that God is our treasure. This is good news, because it means very simply that the command to obey is the command to be happy in God. The commandments of God are only as hard to obey as the promises of God are hard to believe. The Word of God is only as hard to obey as the beauty of God is hard to cherish.
John Piper...we should all fortify ourselves against the dark hours of depression by cultivating a deep distrust of the certainties of despair. Despair is relentless in the certainties of its pessimism. But we have seen again and again, from our own experience and others', that absolute statements of hopelessness that we make in the dark are notoriously unreliable. Our dark certainties are not sureties.
John Piper