discretion

discretion /dɪˈskrɛʃən/ noun
discretion
/dɪˈskrɛʃən/
noun
Britannica Dictionary definition of DISCRETION
[noncount]
1 
: the right to choose what should be done in a particular situation
◊ Something that is done at your discretion is done if, how, when, etc., you choose to do it.
2 
: the quality of being careful about what you do and say so that people will not be embarrassed or offended : the quality of being discreet
— opposite indiscretion

discretion is the better part of valor

— used to say that it is better to be careful than to do something that is dangerous and unnecessary