詩篇的第四卷以最古老的詩集開始。內容分別是：摩西靠著永生上帝為他信仰作見證（詩90），上帝的子民找到他們的避難所（詩91），也在主裡得著喜樂（詩92），這位主就是統管一切的主（詩93），並按著自己的法度懲治惡人（詩94），然後邀請世人齊來崇拜的呼聲傳遍天下（詩95），向祂唱歌讚美（詩96），同時歡欣鼓舞的看見以色列的上帝那無與倫比的大能（詩97）。

        它是那麼小，除非你刻意尋找，否則幾乎不會注意到！
        到底是什麼呢？那是標準局核准的「正字標記」！許多顧客就是依此標記決定是否要購買該產品的！
        詩篇九十篇裡，摩西提到的另一個「正字標記」──不是蓋在產品上的，而是蓋在生命中的；頒發這個標記的，不是國家標準局，是上帝自己！與短暫的人生相較，上帝將祂的「永生之章」保留給努力的人（17節），地上的產品很快就會腐朽，但上帝的印記卻是永遠長存，凡你所作的若使你與上帝隔離，那麼結局就是滅亡；凡你所做的若能完成上帝的榮耀，結局就是永生（太6：19-21）。
        在你家到處找找看，有沒有「正字標記」的產品或用具，小心地把那標記撕下來，貼在家中或辦公室一個顯著的地方，讓它整天提醒你要活在上帝的印記中──以永恆的價值來看待它！

        詩篇九十篇的黑暗背景
        七到十二節似乎在暗示摩西寫詩篇九十篇時，正值他在曠野流浪──四十年間，六十萬以色列男子（與其妻子）死於對上帝的不信（民14：21-23），有那一件事比以色列人死亡有更清楚明白的提醒呢（詩90：9，10）？他們在四十年內，一天二十四小時中，平均每二十分鐘就得舉行一個葬禮。

凡為上帝榮耀的緣故行善的人，雖不求回報，但終究兩者皆得！

English

        Book 4 opens with the oldest of the psalms, Moses' testimony of faith in an eternal God (90). God's people find their refuge (91) and their joy (92) in the God who reigns over all (93) and avenges the wrongs done to His own (94). The invitation is extended for all to worship (95), sing praises (96), and gladly acknowledge the incomparable greatness of the God of Israel (97).

        Because of its size you seldom notice it, yet thousands of items sold today display it proudly. What is it? A seal of approval granted by a testing agency. For many shoppers, the presence of such a recommendation has a significant impact on their decision to buy die product.
        In Psalm 90 Moses speaks of another "seal of approval"— this one found not on a product, but on a life; one issued not by a testing agency, but by God Himself. In contrast to the briefness of human life, God reserves His stamp of approval for endeavors of eternal significance (v. 17). Earthly products soon rust or wear out, but God's seal of approval is the mark of eternity on a life. Whatever is done apart from God ends in death; whatever is accomplished for His glory lasts for eternity (Matthew 6:19-21).
        Look for a "seal of approval" on a product or appliance you may have around the house. Carefully remove the seal and put it in a prominent place in your home or office to remind you throughout die day to live for God's approval—with eternity's values in view.

        The Dark Background of Psalm 90
        Verses 7-12 seem to indicate that Moses wrote Psalm 90 during the time of wilderness wandering—the 40-year period when 600,000 Israelite men (and their wives) died for unbelief (Numbers 14:21-23). What clearer reminder of Israel's mortality could there be (Psalm 90:9-10) than an average of one funeral every 20 minutes, 24 hours a day, for 40 years!

He who does good for God's glory seeks neither praise nor reward, but is sure of both in the end.