The spirit is willing but the flesh is weak ???

The spirit is willing but the flesh is weak ???
Is it?

Leonardo da Vinci [leoˈnardo daˈvintʃi] - 15. April 1452 in Anchiano near Vinci; † 2. Mai 1519 in Castle Clos Lucé, Amboise


Michelangelo di Lodovico Buonarroti Simoni [mikeˈlandʒelo bu̯onarˈrɔːti] - 6. March 1475 in Caprese (in Casentino –over Arnotal northern from Arezzo), Toskana; † 18. February 1564 in Rom


Vincent Willem van Gogh - 30. March 1853 in Groot-Zundert (today: Zundert) near Breda, Niederlande; † 29. Juli 1890 in Auvers-sur-Oise, France


Pablo Ruiz Picasso - 25. Oktober 1881 in Málaga; † 8. April 1973 in Mougins, France


Can we make our flesh - supple, amenable, sequacious, squeezable ?
MAYBE NOT ALL OF US !