One of his most famous paintings (contains two different versions of The Kiss):
<3
Compare the deviations in his style!
These:
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To these:
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Sidenote: he didn't write too much about himself or his art.
wikipedia article
In a rare writing called "Commentary on a non-existent self-portrait", he states "I have never painted a self-portrait. I am less interested in myself as a subject for a painting than I am in other people, above all women...There is nothing special about me. I am a painter who paints day after day from morning to night...Who ever wants to know something about me... ought to look carefully at my pictures."
