"Holy Scripture" is the Word of God, the Word of Wisdom, written down by the Patriarchs, Prophets and Apostles. They are the Word of God's Will, the Laws of true Holiness, designed for spiritual and moral sanctification, for the separation of man from sin.
Sacred Scriptures are the Books of the Bible, written by men who know the Will of God and are moved by the Holy Spirit of Divine Wisdom.
Sacred Scripture lays out the patterns of development of the six periods of Man's formation history, the causes of his spiritual fall, and the ways of his rebirth. The Bible is the most convincing, complete and true spiritual Source of knowledge, the only Criterion for the true evaluation of all phenomena and processes that occur in man and society.
The Wisdom of God's Will, as expressed in the Holy Scriptures, is the "Luminary," the spiritual Reference Point that stands in the "dark place" of the sinful world until Wisdom and Holiness shine in the hearts of men by their adherence to the Commandments of God.