I rejoice at thy word, as one that findeth great spoil. At having it, which is a distinguishing blessing; all are not favoured with it; and is an inestimable treasure, a field in which a treasure lies; which those that find rejoice at, and especially at the understanding of it, as Kimchi notes: for such only delight in it who spiritually understand it, or have an application of it to them; find it, and eat it, and then it is the joy and rejoicing of their hearts.
The doctrines of it are matter of great joy, particularly which concern the grace of God, the person of Christ, and peace, pardon, righteousness, and salvation by him; and each of its promises, which are exceeding great and precious; and, when opened and applied in a time of need, occasion great joy; such as is expressed at finding a great spoil, when much substance comes into the hands of the conqueror, as well as victory.
The word is a part of the believer's spiritual armour, by which he overcomes his enemies; as well as it acquaints him with the conquest Christ has obtained over them, and made him a sharer in; and directs him to unsearchable riches, to things more valuable than thousands of gold and silver; so that he has great reason to rejoice at it in such a manner indeed!