Cicero said, "The life given us by nature is short, but the memory of a life well spent is eternal," notes A Memory Tree. Another statement appropriate for remembering a loved one is, "To live in hearts we leave behind is not to die," expressed by Thomas Campbell. There is a Hebrew proverb that advises, "Say not in grief 'he is no more' but in thankfulness that he was."
Marcus Tullius Cicero, who died in 43 BC, was a Roman lawyer, philosopher and politician. He was also an outstanding orator, who had a profound influence on the language of Latin. Cicero's comment about life's shortness emphasizes the importance of the quality of a life lived. It also showcases his mastery of prose.
Thomas Campbell was a Scottish poet who died in France in 1844. He wrote sentimental poetry, the subject of which was usually human matters. His words stress that one whose memory affects a person's emotions or feelings is really still alive in a sense. The comment evidences his penchant for sentimentality.
The Hebrew proverb, somewhat similar to Cicero's words in its message of remembering a life, does not analyze the quality of that life but encourages people to just be happy that the individual lived.