Psalm 27 (NKJV)
The Lord is my light and my salvation;
Whom shall I fear?
The Lord is the strength of my life;
Of whom shall I be afraid? 

He takes up the law of the Lord as the rule of his life; he brings all his actions and affections to this holy standard. He looketh into the perfect law of liberty; and is not a forgetful hearer, but a doer of the word; and is therefore blessed in his deed. He not only reads to gain knowledge from the Divine oracles, but he meditates on what he has read, feeds on it; and thus receiving the sincere milk of the word, he grows thereby unto eternal life. This is not an occasional study to him; it is his work day and night. As his heart is in it, the employment must be frequent, and the disposition to it perpetual.
When the wicked came against me
To eat up my flesh,
My enemies and foes,
They stumbled and fell.