There are many synonyms for the popular English saying "there may be snow on the rooftop but there is fire in the furnace". It is generally used to describe an older person who may appear elderly, but still has energy and passion in their life. Some common synonyms for this phrase include "age is just a number", "still young at heart", "life's not over yet", "not ready to retire", "full of life", "vitality knows no age", and "never too late to start". All of these phrases convey the same message that you are never too old to enjoy life and pursue your passions.