Myfreedom is my control of my own life-energy, for the uses of which I, alone, amtherefore responsible.

我的自由即是我对自身生命活力的控制，因为如何渡过自己的一生是我个人的责任所在，也只有我才能对自己负责。

youdao

But the exercise of this freedom is anotherthing, since in every use of my life-energy I encounter obstacles.

但是实践自由则是另一回事，因为每当我使用自己的生命活力，我都会遇到阻碍。

youdao

She seemed invigorated, full of life and energy.

她看来生气勃勃，满怀生命力和精力。

《柯林斯英汉双解大词典》

In essence, the question is: How much life-energy does it really take to make a certain amount of money?

FORBES: 4 Steps to Calculating Your Life-Energy Number

How much life-energy was I going to spend on those shoes?

FORBES: 4 Steps to Calculating Your Life-Energy Number

Reiki, the Japanese art of laying on hands, is based on the notion that an unseen, life-giving source of energy flows through our bodies.

NEWYORKER: The Operator