Your search for "When love and skill work together, expect a masterpiece. - John Ruskin 1819 - 1900" revealed the following:

RW-1.6 - Genius begins great works; labor alone finishes them. - Joseph Joubert 1754 - 1824

YT-1.6 - Genius begins great works; labor alone finishes them. - Joseph Joubert 1754 - 1824

S2T- Genius begins great works; labor alone finishes them. - Joseph Joubert 1754 - 1824