Another Hymnsight from the Past

The other week, while I was at my interning church, we were singing hymns (as usual). While I am still adjusting to singing older songs (and even beginning to enjoy them), already I am being taught by God how He can use anything to help us realize His great truths. This time, we sang this chorus:

"I will enter His gates with thanksgiving in my heart,
 I will enter His courts with praise,
 I will say this is the day that the Lord has made,
 I will rejoice for He has made me glad."

"He has made me glad, He has made me glad,
 I will rejoice for He has made me glad.
 He has made me glad, He has made me glad,
 I will rejoice for He has made me glad."

As we sang this, I realized the importance of the Christian to always be joyful in Christ. How often do I go about my life in a miserable or depressed manner? I understand that it is unreasonable to expect myself to be bursting with euphoria 24/7, but that is not equate with joy. Not only are we to be active in in our gladness by rejoicing, though, but we are also to passively rejoice in being glad. As a redeemed person, I can rejoice knowing that I am now no longer in danger of hell; additionally, I can rejoice that I am no longer separated from God's holiness and goodness.

So how can I apply this to my spiritual walk with God? Well, ultimately, I should pray that God would work within my heart, and change me more and more to be filled with a consistant joy in Him, regardless of my circumstances.