a.1.Having the thoughts and affections placed on, or suitable for, heaven and heavenly objects; devout; godly; pious.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
Leighton a "sweet preacher," Helen - a "dear, delightful, heavenly-minded man"?'
Being so heavenly-minded won't help, use new inspirations to refocus your practical efforts for earthly good.
DON'T be so heavenly-minded that you're no earthly good.