This table is for reference. The relevant web page is here.

0	Original	L'essentiel	est invisible	pour les yeux
1	Woods 1943	What is essential	is invisible	to the eye
2	Cuffe 1995	What is essential	is invisible	to the eye
3	Testot-Ferry 1995	What is essential	is invisible	to the eye
4	Wakeman 1997	What matters	is invisible	to the eyes
5	Howard 2000	Anything essential	is invisible	to the eyes