The rare word rendered "extremity" in ver. 9 occurs only here and in x. 1. It means a cutting off, _i.e._, of hope of deliverance. The notion of distress intensified to despair is conveyed. God's judgments show that even in such extremity He is an inexpugnable defence, like some hill fortress, inaccessible to any foe. A further result of judgment is the (growing) trust of devout souls (ver. 10). To "know Thy name" is here equivalent to learning God's character as made known by His acts, especially by the judgments anticipated. For such knowledge some measure of devout trust is required, but further knowledge deepens trust. The best teacher of faith is experience; and, on the other hand, the condition of such experience is faith. The action of knowledge and of trust is reciprocal. That trust is reinforced by the renewed evidence, afforded by the judgments, that Jehovah does not desert them that seek Him. To "seek Him" is to long for Him, to look for His help in trouble, to turn with desire and obedience to Him in daily life; and anything is possible rather than that He should not disclose and give Himself to such search. Trust and seeking, fruition and desire, the repose of the soul on God and its longing after God, are inseparable. They are but varying aspects of the one thing. When a finite spirit cleaves to the infinite God, there must be longing as an element in all possession and possession as an element in all longing; and both will be fed by contemplation of the self-revealing acts which are the syllables of His name.