Delight yourself in the Lord , and he will give you the desires of your heart. Psalms 37:4 ESV
Heart desire is whatever you want or long for earnestly with deep passion. Our text reveals having this met, is very possible dependent on your relationship with the Lord. 
Beloved, when you take pleasure in doing what the Lord wants, serving Him, and being happy with Him; He’ll take pleasure in doing whatever you want, because whatever you want will be in harmony with and very pleasing to Him. When He takes pleasure in doing what you want, then all your heart desires will be met and fulfilled. When all your desires are met, you’ll have unlimited  happiness! Do you have any unfulfilled dream or desire? Find out what the Lord said about it and take pleasure in doing it, then you’ll have whatever is your desire!
Grace upon grace!