R.C. Sproul on Head Coverings
R.C. Sproul (1939–2017) argues that it is a moral duty for a woman to cover her head during public worship, and to do otherwise is to violate a biblical principle and sin against God.
Theology
Lord of the Sabbath
John Murray (1898–1975) expounds upon the meaning of Mark 2:27-28 regarding the lordship of Christ over the Sabbath.