In Chapter 3 of Pirkei Avos, the first Mishnah says:
1 Akavia the son of Mahalalel would say: Reflect upon three things and you will not come to the hands of transgression. Know from where you came, where you are going, and before whom you are destined to give a judgement and accounting. From where you came—from a putrid drop; where you are going—to a place of dust, maggots and worms; and before whom you are destined to give a judgement and accounting—before the supreme King of Kings, the Holy One, blessed be He.
א) עֲקַבְיָא בֶּן מַהֲלַלְאֵל אוֹמֵר: הִסְתַּכֵּל בִּשְׁלֹשָׁה דְבָרִים, וְאֵין אַתָּה בָא לִידֵי עֲבֵרָה. דַּע מֵאַֽיִן בָּֽאתָ, וּלְאָן אַתָּה הוֹלֵךְ, וְלִפְנֵי מִי אַתָּה עָתִיד לִתֵּן דִּין וְחֶשְׁבּוֹן. מֵאַֽיִן בָּֽאתָ: מִטִּפָּה סְרוּחָה. וּלְאָן אַתָּה הוֹלֵךְ: לִמְקוֹם עָפָר רִמָּה וְתוֹלֵעָה. וְלִפְנֵי מִי אַתָּה עָתִיד לִתֵּן דִּין וְחֶשְׁבּוֹן: לִפְנֵי מֶֽלֶךְ מַלְכֵי הַמְּלָכִים הַקָּדוֹשׁ בָּרוּךְ הוּא.
The question is:
Why does the Mishnah divide itself into three parts, first telling us "Reflect upon three things", without specifying what they are, then it specifies what they are in a basic way, but not in detail, and only then does it specify them in detail, why doesn't it initially simply specify them all in detail, something like:
Akavia the son of Mahalalel would say: know from where you came -- a putrid drop, where you are going -- a place of dust, maggots, and worms, and before whom you are destined to give a judgment and accounting -- before the supreme King of Kings, the Holy One, blessed be He -- and you will not come to the hands of transgression