Go without saying
Definition 1 of 1
Pro Tip 1/3Implied Truth
Use this phrase for statements that are accepted as truth without needing proof or explanation. 
It goes without saying that the sun rises in the East.
Pro Tip 2/3Unspoken Agreement
Apply it when something is mutually understood and agreed upon by everyone involved. 
In any professional sport, it goes without saying that practice is essential.
Pro Tip 3/3Cultural Assumptions
Recognize that what 'goes without saying' may vary between cultures and be sensitive to this. 
In many cultures, it goes without saying that you should take off your shoes when entering a home.