The secret of H-A-P-P-Y.
H—humility. Joy begins with humility. To say, “Restore, O Lord,” requires the humility to admit that you need restoring. Jesus said “Blessed [or happy] are the poor in spirit, for theirs is the kingdom of heaven. Blessed are those who mourn, for they shall be comforted. Blessed are the meek, for they shall inherit the earth. Blessed are those who hunger and thirst for righteousness, for they shall be satisfied” (Matthew 5:3-6). This psalm is saying that restoration begins with having the humility to ask for it.
A – advice. Notice it is “our” (Psalms 126:4), not “my,” fortunes. The psalmist is doing this in community. Let me make a pastoral sidebar here. In my view there is a medical condition called “clinical depression.” I have known people, very godly, holy people, who are clinically depressed. This is not because they are sinning. It is not because they are not praying enough or trying hard enough. It is because there is a medical condition called “clinical depression.” If you have felt sad for a long time, and you talk to someone who cares about you and knows you well and they say, “Well maybe you should go and see someone,” then just do it. You have nothing to lose other than your pride. That is different from being temperamentally slightly melancholic or Eeyore-like. That’s a personality type, a glass-half-empty kind of person. Fine. But if it’s more than that, get some advice.
P – Perspective. There is a perspective going on in this contrast. Negeb, streams flowing in the desert. Tears, leading to joy. So far in these Psalms of Ascent we have been through the dark side of the emotions, asking for help, now we are coming to the bright side of the emotions: joy, happiness, in God. The perspective here is the story line of the Bible. What we are really talking about is the gospel. So this is not merely a contrast of a cathartic effect—weeping then rejoicing. This is saying, “Because of who God is, because of what the gospel is, if you turn to God he will restore you.”
The story of the gospel is that God has come to rescue us in Christ. Part of experiencing true joy is keeping that perspective your perspective. It’s working hard at whatever is noble and true and thinking about such things (see Philippians 4:8). The point of Paul’s words there in Philippians is not just looking at a flower rather than at a depressing piece of news, though that can be wise at times. It is looking at the flower and asking, “What does that tell me about who God is as the creator?” It is asking, when you hear that bit of bad news, “What does that tell me about the fallen world, and how glad does that make me that God is going to make a new heaven and a new earth, and he is redeeming his people through the gospel?” Perspective, perspective. Martyn Lloyd-Jones in his book Spiritual Depression says, “The trouble with Christians is they listen to themselves when they should talk to themselves.”1 Talk to yourself, that is, in the sense of adopting a gospel perspective of what is happening.
P – Prayer. This is a prayer: “Restore our fortunes, O Lord.” Some of us need to slow down to make room for prayer. Let me ask you a direct question: are you having a regular, daily quiet time? I don’t mean with four other people in the room in a Bible study, good as that is; or with your family in devotions, excellent as that is. I mean you on your knees or in your favorite chair, with the Bible open, quiet around, and connecting with God in prayer and saying, “Lord, would you restore me to joy?”
Y – You. a book called The God Centered Life, so why now talking about you?because to be truly joyful, you (or “our,” as in the psalm; it is “you” in the plural) need to be restored to who you were designed to be. It is restoration, coming back to the way you were meant to be as designed by God. It is a God-centered you. The gospel enables you to become you as you were meant to be, the new creation. It is to be reconciled to God, to be in Christ and Christ in you, to have your sins removed and his righteousness yours as you are in Christ. This restoration happens as you become a Christian; it happens more and more as you follow Christ.
Taken From : http://www.biblestudytools.com/bible-study/topical-studies/the-secret-of-joy-psalm-126.html?utm_source=Bible%20Study%20Tools%20Weekly&utm_medium=email&utm_campaign=02/18/2014