“And if thy right hand offend thee, cut it off, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell.”
Matthew 5:30 — Greek Interlinear
Church Fathers on Matthew 5:30
Because we ought not only to avoid actual sin, but even put away every occasion of sin, therefore having taught that adultery is to be avoided not in deed only, but in heart, He next teaches us to cut off the occasions of sin.
But if according to that of the Prophet, 'there is no whole part in our body,' [Ps 38:3] it is needful that we cut off every limb that we have that the punishment may be equal to the depravity of the flesh.
Therefore by the right eye and the right hand we must understand the love of brethren, husbands and wives, parents and kinsfolk; which if we find to hinder our view of the true light, we ought to sever from us.