The joy of the Lord is your strength.  –Neh 8:10

Joy is not necessarily the absence of suffering, it is the presence of God. –Sam Storms

The test of Christian character should be that a man is a joy-bearing agent to the world. –Henry Ward Beecher

When the heart is full of joy, it always allows its joy to escape. It is like the fountain in the marketplace; whenever it is full it runs away in streams, and so soon as it ceases to overflow, you may be quite sure that it has ceased to be full. The only full heart is the overflowing heart. –C.H. Spurgeon

The joyless Christian reveals himself by having negative thoughts and talk about others, in a lack of concern for others welfare, and a failure to intercede on others behalf. Joyless believers are self-centered, selfish, proud, and often vengeful and their self-centeredness inevitably manifests itself in prayerlessness. –John MacArthur 

God threatens terrible things if we will not be happy. –Jeremy Taylor

If you have no joy, there’s a leak in your Christianity somewhere. –Billy Sunday

If Christians do not rejoice, it is not because they are Christians, but because they are not Christian enough. Joy is the rational state of the Christian in view of his spiritual position in Christ. –Alistair Begg

The purpose of rejoicing is not so we can feel better emotionally (though that will happen). The purpose of joy is to glorify God by demonstrating to an unbelieving world that our loving and faithful heavenly Father cares for us and provides for us all that we need. –Jerry Bridges

Holy joy will be oil to the wheels of our obedience. –Matthew Henry

There is not one blade of grass, there is no color in this world that is not intended to make us rejoice. –John Calvin

We are half hearted creatures, fooling about with drink and sex and ambition when infinite joy is offered us, like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at the sea. We are far too easily pleased.  –C.S. Lewis

The joy of the Lord will arm us against the assaults of our spiritual enemies and put our mouths out of taste for those pleasures with which the tempter baits his hooks. –Matthew Henry

We ask God to forgive us for our evil thoughts and evil temper, but rarely, if ever ask Him to forgive us for our sadness. –R. W. Dale

I sometimes wonder whether all pleasures are not substitutes for joy. — C. S. Lewis

Joy is a net of love by which you can catch souls. A joyful heart is the inevitable result of a heart burning with love.  –Mother Teresa

Joy, not grit, is the hallmark of holy obedience. We need to be light-hearted in what we do to avoid taking ourselves too seriously. It is a cheerful revolt against self and pride. –Richard J. Foster

I cannot even imagine where I would be today were it not for that handful of friends who have given me a heart full of joy. Let’s face it, friends make life a lot more fun. –Chuck Swindoll

Joy is the serious business of Heaven.–C.S. Lewis

Man cannot live without joy; therefore when he is deprived of true spiritual joys it is necessary that he become addicted to carnal pleasures. –Thomas Aquinas

The world looks for happiness through self-assertion. The Christian knows that joy is found in self-abandonment. ‘If a man will let himself be lost for My sake,’ Jesus said, ‘he will find his true self.’ –Elisabeth Elliot

There are only two kinds of people in the end: those who say to God, “Thy will be done,” and those to whom God says, in the end, “Thy will be done.” All that are in Hell, choose it. Without that self-choice there could be no Hell. No soul that seriously and constantly desires joy will ever miss it. Those who seek find. To those who knock it is opened.’  –C.S. Lewis

Sorrow enlarges the capacity of the heart for joy. — Richard Mahew

It is an unfortunate thing for the Christian to be melancholy. If there is any man in the world that has a right to have a bright, clear face and a flashing eye, it is the man whose sins are forgiven him, who is saved with God’s salvation. — Charles Spurgeon