Part and parcel of something
Definition 1 of 1
Pro Tip 1/3Indispensable Element
Means something is so important that it cannot be removed without changing the nature of something. 
Regular practice is part and parcel of mastering a language.
Pro Tip 2/3Not Literal Parts
Not about physical pieces, but about aspects that are fundamental to the whole. 
In any culture, traditions are part and parcel of the community's identity.
Pro Tip 3/3Implicit Acceptance
Used when you acknowledge that certain things naturally come with situations or roles. 
Dealing with customer complaints is part and parcel of retail work.