Nowadays...

"Plant a tree, write a book, have a child".

Said by José Martí, cuban independence hero, in the late 19th century.

If bet if he lived in our beloved 21st century he would have said:

"You have got to plant a tree (otherwise, we'll die from greenhouse effect), those who are smart try reading books, and please stop having children with people you don't know the first thing about".