Psalm 37:4 (NIV)
Delight yourself in the Lord and he will give you the desires of your heart.
If I offer you a dessert after dinner, I might say "Delight yourself in this." What do I mean? You may never have tasted this dessert before, but I say to you that you will enjoy it. How do I know this? Because I have tasted it myself. Now suppose I only gave you one bite. You'd be wanting more, that would be the desire of your heart. Because of my not wanting to deny you your pleasure, I would give you more.
Once you have experience the joy of the Lord, that will be your desire. God will surely give you more. The wonderful thing is that I might leave you wanting more of that dessert because I have no more, but God's delights will never be exhausted.
Ephesians 3:19-21 (NKJV)
To know the love of Christ which passes knowledge; that you may be filled with all the fullness of God.
Now to Him who is able to do exceedingly abundantly above all that we ask or think, according to the power that works in us, to Him be glory in the church by Christ Jesus to all generations, forever and ever. Amen.