For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do. (Ephesians 2:10)
Our purpose in life is to do good.
Our purpose is to be a force for good.
As Mihaly Csikszentmihalyi noted, everything not just energy, but relationships, structure and society all increase in entropy.
Unless we nurture our relationships with our wife, children, family, friends, colleagues, it will decay.
To create increase in entropy, will energy must be utilized, a conscious effort must be made.
Jesus calls us to be the "salt of the world", "the light of the world". Salt prevents decay, salt must be gathered and applied. Light needs a fuel source to burn brightly.
We are called to do good works, which have been prepared in advance for us to do. We should think each day, "What good is there that I have a joyful duty to fulfil today?"
Doing good takes effort. Everything from doing the laundry, to work and play takes effort. We must be aware of the good in each situation and context in which it takes place in. A certain action in one instance may be good but in another may be bad.
Our doing good is part of the big picture of life. We are part of a grander plan, far beyond what our minds can conceive. We may never fully see the big picture, but we can concentrate on the task before us, that is at hand.
We must always choose to do good in each situation, and not just good, but the best option of goodness available. They say the enemy of the best is not the bad but the second best.
If we are not choosing the best, then what are we then choosing?
"Therefore, as we have opportunity, let us do good to all people, especially to those who belong to the family of believers." (Galatians 6:10)