be part and parcel of

be part and parcel of

be an essential feature or element of.
Both part and parcel ultimately come from Latin pars meaning ‘part’ and in this phrase they have virtually identical senses. The phrase is first recorded in mid 16th-century legal parlance; it is now used in general contexts to emphasize that the item mentioned is absolutely integral to the whole.
1998 Spectator It's not enough for people just to shrug their shoulders and say, ‘Well, that is part and parcel of being in public life’.
See also: and, of, parcel, part