Leha'alos Ner Tamid

להעלות נר תמיד - הילאמ הלוע תבהלש אהתש דע קילדמ )שבת כ"א(: רש"י שמות פכ"ז פ"כ
One lights until the fire rises on its own.
Every person has a torch and warmth in their heart.
One must kindle himself with Mitzvos to the extent that it will make the flame rise from his heart to his mind, for the name of Hashem:

Bais Aharon - Karlin