הִתְבַּשֵּׁל בַּמִּיץ שֶׁל עַצְמוֹ

ביטוי (אנגלית)

To stew in one's own juice

הגדרה (אנגלית)

By analogy: Thought over and formed positions without revealing them to other opinions. Was occupied with himself or his creation while disconnected from the surroundings.

(Modern Hebrew)