Adjective
not wise
(Ulster) insane
Suppose that we are wise enough to learn and know - and yet not wise enough to control our learning and knowledge, so that we use it to destroy ourselves? Even if that is so, knowledge remains better than ignorance. Isaac Asimov
To let friendship die away by negligence and silence is certainly not wise. It is voluntarily to throw away one of the greatest comforts of the weary pilgrimage. Samuel Johnson
It's not wise to violate rules until you know how to observe them. T. S. Eliot
When a man is not a lover in his twenties, not strong in his thirties, not rich in his forties and not wise in his fifties he will never be so. Czech Proverb
He is not wise who places a stones on his own roof. Tahitian Proverb
He is wise to no purpose, who is not wise for himself. Latin Proverb