"Seeking to deepen" – desiring to enhance.
"Scriptures" – Scriptural texts.
The next part: "By following the steps outlined above, you can access a free PDF version of The Bible Knowledge Commentary and start unlocking the riches of the scriptures." Terms to replace are "access a free PDF version" and "unlocking the riches." For "access," synonyms like obtain at no charge. "Unlocking the riches" could be discover the gems. The Bible Knowledge Commentary Free Pdf
Second sentence: "Bible study guides: Use Bible study guides or workbooks..." Replace "Bible" with Scripture in both instances. "Seeking to deepen" – desiring to enhance
"However, understanding the complexities and nuances of the scriptures can be a daunting task, especially for those without extensive theological training." "Complexities" → Complications, "nuances" → Subtleties (maybe not necessary), "daunting task" → Harrowing assignment, "extensive" → In-depth. "Unlocking the riches" could be discover the gems