Psalms 119:42

Wherewith - The things with which...

So shall I have wherewith to answer - Many say, "My hope in thy mercy is vain;" but when thou fulfillest thy promises to me, then shall I answer to the confusion of their infidelity.

So shall I have wherewith to answer him that reproacheth me - I shall have something by which I may reply to those who calumniate me. So the Saviour replied to the suggestions of the tempter almost wholly by passages of Scripture Matthew 4:4, Matthew 4:7,Matthew 4:10; and so, in many cases, the best answer that can be given to reproaches on the subject of religion will be found in the very words of Scripture. A man of little learning, except that which he has derived from the Bible, may often thus silence the cavils and reproaches of the learned sceptic; a man of simplehearted, pure piety, with no weapon but the word of God, may often thus be better armed than if he had all the arguments of the schools at his command. Compare Ephesians 6:17.

For I trust in thy word - I believe it; I rely on it; I confide in that, as my only comfort and protection.