Does fish strain to swim? No, it is its nature to swim in water with ease.
Does Sun strain to shine? No, it is its nature to shine with ease
Do we strain to breathe? No, it is our nature to breath in and out with ease. We don’t even notice that we are breathing.
Likewise, it is our nature to achieve our desires in life with ease.
Likewise, it is our nature to be happy in our life with ease.
Likewise, it is our nature to have an ageless body with ease.

All along this society have done mind manipulation with thoughts like
a. No pain No gain
b. We born out of sin
c. Rich become richer, poor becomes poorer
d. Money is evil
e. Too much of money is bad for you
Come out of this old age thoughts, and start believing that whatever your will might be, if you believe you can do, you would end up achieving it.