I loved this quote from the book
The Christian faith "was not designed for concealment. From its very nature, it cannot be hid. It inclines every one who possesses it, [sic] to do good to all mankind, and to make known the gospel by which all mankind are to be blessed” (121).9Marks is an incredibly important ministry. Consider donating a few bucks to help them serve local churches with their materials and conferences. Here's the link to the donation page.