כִּ֤י אֶת־כָּל־מַֽעֲשֶׂ֔ה הָאֱלֹהִ֛ים יָבִ֥א בְמִשְׁפָּ֖ט עַ֣ל כָּל־נֶעְלָ֑ם אִם־ט֖וֹב וְאִם־רָֽע׃<br><small>[סוף דבר הכל נשמע את־האלהים ירא ואת־מצותיו שמור כי־זה כל־האדם]</small>
For God shall bring every work into the judgment concerning every hidden thing, whether it be good or whether it be evil.<br><small>[The end of the matter, all having been heard: fear God, and keep His Commandments; for this is the whole man.]</small>
Mesilat Yesharim
Rather on all of them, he will preside over and inspect equally, judging each one and meting out punishment afterwards on each and every one according to what it is. This is what Shlomo said: "For G-d will bring every deed into judgment, [with every hidden thing, whether it be good, or whether it be evil]" (Kohelet 12:14). For just like the Holy One blessed be He does not leave any good deed unrewarded, small as it may be, so too He does not leave any bad deed unjudged and unpunished, small as it may be.
Mesilat Yesharim
Besides all this, all the free time he has left from his affairs, if he is wise, certainly he should not waste it. But rather to immediately grasp hold of it and not be lax in it, utilizing it to toil in the affairs of his soul and the improvement of his service of G-d.
Mesilat Yesharim
Why is this so? Because just like the essence of "watchfulness" involves putting matters to mind, so the essence of laughter is to remove from one's mind straight, rational thinking so that thoughts of fearing G-d do not enter his heart at all.