The English meaning of the Latin sentence 'Quam bellum est velle confiteri potius nescire' is the following: How beautiful it is to wish not to [have to] know how to acknowledge something [as] stronger. The word-by-word translation is as follows: 'quam' means 'how'; 'bellum' means 'beautiful'; 'est' means '[it] is'; 'velle' means 'to wish'; 'confiteri' means 'to acknowledge, admit or confess'; 'potius' means 'to be able to or capable of'; and 'nescire' means 'not to know, to be ignorant of'. The phrase expresses the wish to be so stronger that there's no such thing as someone or something higher or stronger.
Something like:
How fine it is to be willing to confess rather to not know what you do not know than to grow ill spewing forth such stuff and to displease oneself.