Anything we perceive to be a struggle in life is in reality the conflict between Fear and Love within us. 'Struggle' simply means "an energetic attempt to achieve something."
We know that energy does not dissipate, it only changes forms. Choose to see every strenuous effort; every contact with an opposing force as an opportunity to transfer Fear Energy into Love Energy.
"There is no fear in love' but perfect love casts out fear because fear involves punishment, and the one who fears is not perfected in love." 1Jn 4:18
Let every moment of struggle perfect your state of being. This applies on your yoga mat as well!