In so far as a man is an unwilling part of a larger whole, he is in bondage; but in so far as, through the understanding, he has grasped the sole reality of the whole, he is free.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“If we have a clear and distinct understanding of this, that part of our nature which is defined by intelligence, in other words the better part of ourselves, will assuredly acquiesce in what befalls us, and in such acquiescence will endeavour to persist.” In so far as a man is an unwilling part of a larger whole, he is in bondage; but in so far as, through the understanding, he has grasped the sole reality of the whole, he is free. The implications of this doctrine are developed in the last Book of the Ethics. Spinoza does not, like the Stoics, object to all emotions; he objects only to those that are “passions,” i.e., those in which we appear to ourselves to be passive in the power of outside forces.” source