When worry is inevitable, enjoy it and be wise. Even continued happiness leads to mental worry.
Thus happiness and worry must be alternative. If you are worried by the continued happiness, you are worried at the cost of the result of your good effort.
Instead of this it is better to get worry at the cost of your sin. Let the sin give some trouble and then you worry out of it.
In this way the result of the sin is spent and the not the result of good effort.
The loss in your present worry may be compensated in the future, but the time lost in your past worry cannot be compensated, because the life span of any human being is fixed.
Your loss may be compensated by million times in the future, but even one second of your lost time can never be compensated. Therefore, understand this and think about the value of the time.
This knowledge of the value of time is called as Kala Gyana, which means the knowledge of the future that you should know, which provides the possibility of the compensation of all the loss except the loss of time. Therefore, time is the most precious.
You may waste anything that can be again procured in the future, but never waste time, which you can never compensate.
There are two ways to escape the mental worry in this world :
The first way is by obtaining the peace, which is zero
The second way is by achieving the bliss, which is plus
Worry is minus, peace is zero and bliss is plus
To escape minus, either you should be in zero or in plus.
Bliss can be obtained only from the Lord in this world.
Since Veda says that the Lord alone is bliss Anando Brahma, Veda also says that the Lord alone can give you the bliss : Esha Hyeva Anandayati, because he himself is Bliss !
Remember that you cannot change what already happened, you have very little idea about future and only thing in your control is your present. If you lost it, your present becomes your irrepairable past.
The one who realized that even this will pass is a Gyani (wise one).
One who realized that everything will pass and nothing is forever, is the ultimate wise one and the liberated soul.
He has achieved salvation or nirvana before death itself.