With my whole heart have I sought thee - See the notes at Psalms 119:2. The psalmist in Psalms 119:2 speaks of the “blessedness of those who seek the Lord with the whole heart;” in this verse he says that this blessedness was his. He could affirm that he had thus sought God. He had such a consciousness that this was the aim and purpose of his life that he could say so without hesitation. Every man who claims to be a religious man ought to be able to say this. Alas, how few can do it!
O let me not wander ... - Keep me in this steady purpose; this fixed design. This is the language of a heart where there is a consciousness of its weakness, and its liability to err, strong as may be its purpose to do right. Such an apprehension is one of the best means of security, for such an apprehension will lead a man to “pray,” and while a man prays he is safe.