Tozer on doxology

“Webster’s Unabridged Dictionary lists 550,000 words. And it is a solemn and beautiful thought that in our worship of God there sometimes rush up from the depths of our souls feelings that all this wealth of words is not sufficient to express. To be articulate at certain times we are compelled to fall back upon “Oh!” or “O!”—a primitive exclamatory sound that is hardly a word at all and that scarcely admits of a definition.”

A.W. Tozer

Challies on Doctrine

“As it happens, the Bible has much to say about doctrine and only ever commends it as something that is of great importance to every Christian. In fact, we cannot rightly consider ourselves faithful followers of Jesus Christ unless we thoroughly know our doctrine, staunchly cling to it, and faithfully defend it. Though the Christian faith is far more than knowing doctrine, it is never less. And yet many who profess to be Christians have only the most rudimentary knowledge of Christian doctrine.”

Tim Challies, Know Your Doctrine

Grudem and Purswell on the consequences of willful sin

“In general, we may say that some sins have more harmful consequences than others if they bring more dishonor to God or if they cause more harm to ourselves, to others, or to the church. Moreover, those sins that are done willfully, repeatedly, and knowingly, with a calloused heart, are more displeasing to God than those that are done out of ignorance and are not repeated, or are done with a mixture of good and impure motives and are followed by remorse and repentance.”
Wayne Grudem and Jeff Purswell
Bible Doctrine: Essential Teachings of the Christian Faith, p. 219-220.