מסכת כלים

פרק כה משנה ח

כיצד

How is this (what is the concept stated in the previous mishnah, of the tahor hands)?

If one's hands were tahor

and the exterior of the cup was tamei,

and one held it by the fingerholds

he need not worry

that perhaps his hand became tamei

from the exterior of the cup.

If one was drinking from a cup

whose exterior was tamei,

he need not worry

that perhaps the liquid in his mouth became tamei

from the exterior of the cup

and went back and rendered the cup tamei.

A kettle that is boiling,

one need not worry

that perhaps liquid went out from inside of it

and touched its exterior

and returned inside it.

כלי הקדש

Utensil for use with kodesh (for use with food from sacrifices)

do not have an exterior or interior (both are treated the same, and any contact with a tamei liquid will render the entire vessel tamei)

and they do not have fingerholds (that are treated differently than their interiors).

And we do not immerse

utensils inside utensils for use with kodesh (the vessels must be separated completely to prevent the possibility of one covering the other while being immersed).

All utensils

become susceptible to tumah by thought (e.g. the ring of an animal, which is normally not susceptible to tumah, that one had in mind to wear it oneself, becomes susceptible as an ordinary ring for a person; the same would go for a vessel that has not been finished to the usual degree that one intends to use in that state),

and do not become impervious from tumah

except through a physical change,

as an act nullifies an act

and a thought,

but the thought does not nullify

neither the act

nor the thought.