Which quotation is an example of an aphorism?

Aphorism is a statement of truth or opinion expressed in a concise and witty manner. The term is often applied to philosophical, moral and literary principles.

Let us look at some aphorism examples:

Youth is a blunder; Manhood a struggle; Old age regret. [Benjamin Disraeli]

Pride hath fall. [Proverb]

The man who removes a mountain begins by carrying away small stones. [William Faulkner]

Life’s Tragedy is that we get old too soon and wise too late. [Benjamin Franklin]

Yesterday is but today’s memory, and tomorrow is today’s dream. [Khalil Gibran]

The simplest questions are the hardest to answer. [Northrop Frye]

A proverb is no proverb to you till life has illustrated it.  [John Keats]

Words are, of course, the most powerful drug used by mankind. [Rudyard Kipling]

you need to include the text. we have no idea what you are referring to

1, 4, and 5 are all conflicts