"Delight thyself also in the LORD; and he shall give thee the desires of thine heart." Psalm 37:4
Most of the time I have heard this verse taught or preached, it is given in reverse. Essentially, if you want the desires of your heart, then delight in Him. As a teenager, that was my focus on this verse. There were things I wanted — not even bad things. I tried to delight in the Lord so that I could have those things my heart desired.
Now, as a middle-aged grandmother, I have finally realized my error. It is not about the things my heart desires, it is about the Person I delight in! It is so very important that the LORD should be my delight, my joy, my life.
It is imperative.