"... God wills that we have heroes. Hebrews 13:7 says, "Remember your leaders, those who spoke to you the word of God. Consider the outcome of their way of life, and imitate their faith." It seems to me that the Christian leaders today who come closest to being heroes are the ones who had great heroes. I hope you have one or two, living or dead."
Contending for Our All
"Friendship that includes a common commitment to the gospel is something completely different than friendship without it. I may have cordial relationships with non Christians, but I cannot think of anyone I would call a true friend who is not a fellow believer in Christ."
from this post
"Men tell us that our preaching should be positive and not negative, that we can preach the truth without attacking error. But if we follow that advice we shall have to close our Bible and desert its teachings. The New Testament is a polemic book almost from beginning to end."
-J. Gresham Machen
Christian Scholarship and the Defense of the Faith