The day can’t fight the night

The day can’t fight the night
And the darkness will absorb the light
So when it’s dark and you loss your sight
Just know I kept up the fight.

Not to say I am defeated;
I’m physically standing (and mentally dying)
As a lone cub in the night, I fiercely fend
Sadly as night drags on, my fate is set
Beside all courage, I can soundly bet 
That the day can’t fight the night
Like how the light can’t fight the dark
As we broil and tussle and war
We know that death wins the fight