The most beneficial writings, therefore, are those that reflect the wisdom of the one shepherd, Jehovah God. Excessive attention to other sources of instruction, can wear a person out needlessly, without his gaining much of real and lasting value.Ecclesiastes 12:12
"My son, beware of anything beyond these. Of making many books there is no end, and much study is a weariness of the flesh."
jw's put out a couple new ones every year.
Add to that the old ones they "study" and all their magazines.....no wonder they don't have time to study Scripture
Especially when such writings are a product of worldly reasoning, and they conflict with godly wisdom, are they unwholesome and faith-destroying. On the other hand, the words of those having godly wisdom will, like oxgoads, prick the listeners or readers to advance in harmony with the wisdom stated.
Also, those who occupy themselves with collections of sentences, that is, genuinely worthwhile wise sayings, are like nails. This may be because their good words, reflecting the wisdom of Jehovah God, can serve to stabilize and support the hearers.