But godliness actually is a means of great gain when accompanied by contentment.
For we have brought nothing into the world, so we cannot take anything out of it either.
1 Timothy 6:6-7 (NASB)
How to render yourself fruitful?
Now for this very reason also, applying all diligence, in your faith supply moral excellence, and in your moral excellence, knowledge,
and in your knowledge, self-control, and in your self-control, perseverance, and in your perseverance, godliness,
and in your godliness, brotherly kindness, and in your brotherly kindness, love.
2 Peter 1:5-7 (NASB)
Profitable exercise
“For bodily exercise profits a little, but godliness is profitable for all things, having promise of the life that now is and of that which is to come.”