כִּֽי־בַהֶ֥בֶל בָּ֖א וּבַחֹ֣שֶׁךְ יֵלֵ֑ךְ וּבַחֹ֖שֶׁךְ שְׁמ֥וֹ יְכֻסֶּֽה׃
for it cometh in vanity, and departeth in darkness, and the name thereof is covered with darkness;
Read Jewish philosophical commentary on Ecclesiastes 6:4: and classical philosophical sources.