1. The golden age is before us, not behind us. 

2. Youth looks forward and age backward. 

3. The age of miracles is past. 

4. Idle young, needy age [old].

5. Reckless youth makes rueful age.

6. What youth is used to, age remembers. 

7. Economy is the easy chair of old age. 

8. Wine and judgement mature with age. 

9. An idle youth, a needy age. 

10. A lazy youth, a lousy age. 

11. Youth is a blunder; manhood a struggle, old age a regret. 

12. For age and want save while you may; no morning sun lasts a whole day. 

13. Rear sons for help in old age; and store up grains against famine. 

14. At twenty years of age, the will reigns; at thirty, the wit ; and at forty, the judgment. 

15. Her age disqualified her for the job.

16. He must be getting near retiring age.

17. The children average seven years of age.

18. That species disappeared in the Ice Age.

19. The age difference was a complication to the rela-tionship.

20. It was difficult to tell his exact age.

21. Anyone over eighteen years of age counts as adult.

22. To make good use of life.one should have in youth the experience of advanced years,and in old age the vigor of youth. 

23. Learning is an ornament in prosperity, a refuge in adversity, and a provision in old age. 

24. The follies of youth are food for repentance in old age. 

25. Knowledge is a comfortable and necessary retreat and shelter for us in an advanced age; and if we do not plant it when young,[sentencedict.com] it will give us no shade when we grow old. 

26. In youth the hours are golden in mature years they are silver, in old age they are leaden. 

27. We hope to grow old, yet we fear old age; that is, we are willing to live, and afraid to die. 

28. The only secret a woman can keep is that of her age. 

29. One crowded hour of glorious life is worth an age without a name. 

30. It is not shame for a man to learn that which he knows not, whatever be his age.