There will be times when you're forced to disappoint people because you don't have time to fulfill every obligation set before you. Family, life, and the abundance of the call to ministry require balance, and sometimes there aren't enough hours in the day to fulfill it all. To avoid becoming overwhelmed in ministry, you must disappoint people by telling them no. If you give a yes when no is necessary, you end up people-pleasing, and God's anointing is not on that type of behavior. 

References:

Culture Definition & Meaning | Britannica Dictionary. (n.d.). https://www.britannica.com/dictionary/Culture