Better be wise by the misfortunes of others than by your own. Aesop
It is never too late to be wise. Daniel Defoe
You can't be wise and in love at the same time. Bob Dylan
Where ignorance is bliss, 'tis folly to be wise. English Proverb
Do not be wise in words – be wise in deeds. Jewish Proverb
To love and be wise is incompatible. Portuguese Proverb