Through the Apostle Paul in Phil. 4:8, the Lord exhorts His children to cultivate Gospel-centered thinking:
Finally, brethren, whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise, dwell on these things. (NASB)
A wonderful online resource that can help you fulfill this gracious mandate is “Grace Gems.” Based on mostly Puritan writings, you’ll find numerous Christ-exalting resources. Among other things, you can sign up to receive daily devotional quotes via email. I’ve been greatly refreshed in receiving these for a number of years.
The Lord has left us a rich collection of godly literature from previous generations. Take advantage of it – for the nourishment of your soul, the blessing of others, and the glory of God!