כִּ֤י פַ֣חַד פָּ֭חַדְתִּי וַיֶּאֱתָיֵ֑נִי וַאֲשֶׁ֥ר יָ֝גֹ֗רְתִּי יָ֣בֹא לִֽי׃
Denn das, wovor ich gezittert, traf mich; was ich gefürchtet, kam über mich.
Avot D'Rabbi Natan
Do not think there is no punishment. How so? This teaches us that a person’s heart should be fearful every day [and he should say: Woe is me! Perhaps punishment will come upon me today, or perhaps tomorrow. So he ends up being fearful every day], as it says in Job (3:25), “I have feared and feared.”