What does Matthew 5:30 mean?

Matthew 5:30 KJV
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 NKJV
“And if your right hand causes you to sin, cut it off and cast [it] from you; for it is more profitable for you that one of your members perish, than for your whole body to be cast into hell.

Matthew 5:30 MKJV
And if your right hand offends you, cut it off and throw [it] from you. For it is profitable for you [that] one of your members should perish, and not that your whole body should be thrown into hell.

Matthew 5:30 KJV 2000
And if your right hand causes you to offend, cut it off, and cast it from you: for it is better for you that one of your members should perish, and not that your whole body should be cast into hell.

Interlinear KJV

And /kai/ if /ei/ thy /sou/ right /dexios/ hand /cheir/ offend /skandalizo/ thee, /se/ cut /ekkopto/ it /autos/ off, /ekkopto/ and /kai/ cast /ballo/ it from /apo/ thee: /sou/ for /gar/ it is profitable /sumphero/ for thee /soi/ that /hina/ one /heis/ of thy /sou/ members /melos/ should perish, /apollumi/ and /kai/ not /me/ that thy /sou/ whole /holos/ body /soma/ should be cast /ballo/ into /eis/ hell. /geenna/

Jamieson Fausset-Brown

30. And if thy right hand–the organ of action, to which the eye excites.

offend thee, cut it off, and cast it from thee; for it is profitable, &c.–See on JFB for Mt 5:29. The repetition, in identical terms, of such stern truths and awful lessons seems characteristic of our Lord’s manner of teaching. Compare Mr 9:43-48.