During the last six or seven months of the year 1889, he has also created at least fifteen paintings of olive trees, a subject which he considered as demanding and compelling. Among these works are Olive Trees with the Alpilles in the Background (1889), about which in a letter to his brother Van Gogh wrote, "At last I have a landscape with olives".While in Saint-Rémy, Van Gogh spent time outside the asylum, where he painted trees in the olive groves. In these works natural life is rendered as gnarled and arthritic as if a personification of the natural world, which are, according to Hughes, filled with "a continuous field of energy of which nature is a manifestation".
By this time van Gogh was ready for such lessons, and the changes that his painting underwent in Paris between the spring of 1886 and February 1888 led to the creation of his personal idiom and style of brushwork. His palette at last became colourful, his vision less traditional, and his tonalities lighter, as may be seen in his first paintings of Montmartre. By the summer of 1887 he was painting in pure colours and using broken brushwork that is at times pointillistic. Finally, by the beginning of 1888, van Gogh’s Post-Impressionist style had crystallized, resulting in such masterpieces as Portrait of Père Tanguy and Self-Portrait in Front of the Easel, as well as in some landscapes of the Parisian suburbs.
Gogh, Vincent van: Bouquet of Flowers in a VaseBouquet of Flowers in a Vase, oil on canvas by Vincent van Gogh, c. 1889–90; in the Metropolitan Museum of Art, New York City. 65.1 × 54 cm.Photograph by Trevor Little. The Metropolitan Museum of Art, New York City, The Walter H. and Leonore Annenberg Collection, gift of Walter H. and Leonore Annenberg, 1993, bequest of Walter H. Annenberg, 2002 (1993.400.4)
Van Dyke publicly endorsed Bernie Sanders as his choice for the Democratic candidate in the 2016 US presidential election. Van Dyke, a New Deal Democrat, had not actively campaigned for a candidate since Eugene McCarthy in 1968. In July 2016, Van Dyke said of Donald Trump, "He has been a magnet to all the racists and xenophobes in the country, I haven't been this scared since the Cuban Missile Crisis. I think the human race is hanging in a delicate balance right now, and I'm just so afraid he will put us in a war. He scares me."
On January 27, 2013, at the age of 87, Van Dyke received the 2013 Screen Actors Guild Life Achievement Award. During his acceptance speech, Van Dyke reminisced about his work over the years as an entertainer and stated that his career has "been full of surprises and a lot of fun." He also praised actors working in the industry today, calling them "the greatest generation of actors" and telling them, "You've all lifted the art to another place now." He continued with a rhetorical question for his Hollywood colleagues: "Aren't we lucky to have found a line of work that doesn't require growing up? I love that." Van Dyke is the 49th recipient of the SAG Life Achievement Award, following 2012 honoree Mary Tyler Moore.