Human beings cannot, of course, wholly transcend human nature
 Bertrand Russell, Mysticism and Logic and Other Essays (1910). copy citation

Context

“Insistence on belief in an external realisation of the good is a form of self-assertion, which, while it cannot secure the external good which it desires, can seriously impair the inward good which lies within our power, and destroy that reverence towards fact which constitutes both what is [32] valuable in humility and what is fruitful in the scientific temper. Human beings cannot, of course, wholly transcend human nature; something subjective, if only the interest that determines the direction of our attention, must remain in all our thought. But scientific philosophy comes nearer to objectivity than any other human pursuit, and gives us, therefore, the closest constant and the most intimate relation with the outer world that it is possible to achieve.” source