Final answer:
The incomplete quote does not match a known work but is similar in spirit to Robert Herrick's poem, which encourages enjoying youth and prime before it fades. A creative completion might be 'left wanting' or 'disappointed,' suggesting the consequences of postponing fulfillment.
Step-by-step explanation:
The quote "Save the best for the flame and you will never be _____" does not appear to correspond to a commonly known literary work or a famous saying. However, it seems to evoke a sentiment similar to the theme of the poem "To the Virgins, to Make Much of Time" by Robert Herrick. This poem is often paraphrased with the line 'Gather ye rosebuds while ye may,' which encourages making the most of one's youth and prime before it fades. The poem's message is to not be coy or hesitant but to seize opportunities and enjoy life's pleasures while one still can.
In terms of finishing the given quote, without additional context, it is difficult to provide an accurate completion. However, if we take inspiration from the themes of carpe diem present in Herrick's poem, one might creatively conclude the sentence with something like 'left wanting' or 'disappointed,' embodying the lesson that those who continually put off joy or important life events may end up missing out on them entirely.