Although he fell to the ground because his body could not endure the agonies, he kept his reason upright and unswerving.
His body fell to the ground because it couldn’t stand the pain, but he kept his thinking upright and unbending.
Falling on the ground from his body having no power to endure the pains, he still kept his reasoning upright and unbending.
And though he fell to the ground because his body could not endure the agonies, he kept his reason upright and unswerving.