There is nothing serious in Mortality

Trifles light as air are to the jealous confirmations strong as proofs of holy writ.

Yet but three come one more. Two of both kinds make up four. Ere she comes curst and sad. Cupid is a knavish lad. Thus to make poor females mad.

LEONATO Well, niece, I hope to see you one day fitted with a husband. BEATRICE Not till God make men of some other metal than earth. Would it not grieve a woman to be overmastered with a pierce of valiant dust? to make an account of her life to a clod of wayward marl? No, uncle, I'll none: Adam's sons are my brethren; and, truly, I hold it a sin to match in my kindred.

Strong reasons make strong actions.

...an old man is twice a child.

How well he's read, to reason against reading!