Some random thoughts from the MacDonald's book...

Thinking is a great work. It is best done with a mind that has trained & is in shape just as competitive running is done with a body that has trained and is in shape. The best kind of thinking is accomplished when it is done in the context of reverence for God's kingly reign over all creation. It is sad to see great thinking and artistic work accomplished by man and woman who have no interest in uncovering knowledge of the Creator.

Unthinking christian does not realise it(fear of thinking will lead to amusement, function without thinking), but is dangerously absorbed into the culture about him. A Mind untrained n unfulfilled, lacks the ability to produce the hard questions with which the world needs to be challenged.

Harry Blamires in his insightful book called The Christian Mind wrote :
Christianity is emasculated of its intellectual relevance. It remains a veicle of spirituallity and moral guidance at the individual level perhaps; at the communal level is is little more than an expression of sentimentalized togetherness.
The fear today is that we fool ourselves into thinking that we are thinking people when we are not... and as we don't think and practise "christianly" about great moral issues, we can fall easily fall prey to the propaganda of a non christian scheme of things, led by people who have not neglected powers.

Being good stewards of our resources(brain,wisdom). Christian thinking look at all issues and ideas from the standpoint of what God desires and what might give honour to Him.

Thinking Christianly without a renewal of our commitment to Christ leads to a deadness of religion, a boring faith, an ineffective witness to God. And we who have grown up with the gospel of Christ have to be very careful to avoid this. The mind must be trained to pursue information, ideas and insights for the purpose of serving the people of the public world.