Isaac Watts, the famous hymn writer calls us to be intentional about improving our minds.

…every son and daughter of Adam has a most important concern in the affairs of the life to come, and therefore it is a matter of the highest moment, for everyone to understand, to judge, and to reason right about the things of religion. It is vain for any to say, we have no leisure time for it. The daily intervals of time, and vacancies from necessary labour, together with the one day in seven in the Christian world, allows sufficient time for this, if men would but apply themselves to it with half so much zeal and diligence as they do to the trifles and amusements of this life, and it would turn to infinitely better account.
 
Thus it appears to be the necessary duty and the interest of every person living, to improve his understanding, to inform his judgment, to treasure up useful knowledge, and to acquire the skill of good reasoning, as far as his station capacity and circumstances furnish him as his station, capacity, with proper means for it. Our mistakes in judgment may plunge us into much folly and guilt in practice. By acting without thought or reason, we dishonor the God that made us reasonable creatures, we often become injurious to our neighbors, kindred, or friends, and we bring sin and misery upon ourselves; for we are accountable to God, our judge, for every part of our irregular and mistaken conduct, where he hath given us sufficient advantages to guard against those mistakes.”

 
~ Isaac Watts, The Improvement of the Mind, (1837).
[emphasis added]