Youth comes but once in a lifetime. [ Longfellow ]

True love is the ripe fruit of a lifetime. [ Lamartine ]

His lifetime is full of deeds, not of indolent years. [ Ovid ]

Even books have their lifetime, of which no one can deprive them. [ Johann Wolfgang von Goethe ]

We only see in a lifetime a dozen faces marked with the peace of a contented spirit. [ Henry Ward Beecher ]

If he could only see how small a vacancy his death would leave, the proud man would think less of the place he occupies in his lifetime. [ Legouve ]

Perhaps, if I am very lucky, the feeble efforts of my lifetime will someday be noticed, and maybe, in some small way, they will be acknowledged as the greatest works of genius ever created by Man. [ Jack Handey, Deep Thoughts ]

What with the duties expected of one during one's lifetime, and the duties exacted from one after one's death, land has ceased to be either a profit or pleasure. It gives one position and prevents one from keeping it up. [ Oscar Wilde, The Importance of Being Earnest ]

Opportunities do not come with their values stamped upon them. Everyone must be challenged. A day dawns, quite like other days; in it a single hour comes, quite like other hours; but in that day and in that hour the chance of a lifetime faces us. To face every opportunity of life thoughtfully and ask its meaning bravely and earnestly, is the only way to meet the supreme opportunities when they come, whether open-faced or disguised. [ Maltbie Babcock ]

I have made it a rule never to smoke more than one cigar at a time. I have no other restriction as regards smoking. I do not know just when I began to smoke, I only know that it was in my father's lifetime, and that I was discreet. He passed from this life early in 1847, when I was a shade past eleven; ever since then I have smoked publicly. As an example to others, and - not that I care for moderation myself, it has always been my rule never to smoke when asleep, and never to refrain when awake. It is a good rule. I mean, for me; but some of you know quite well that it wouldn't answer for everybody that's trying to get to be seventy. [ Mark Twain, Seventieth Birthday speech ]