Give that year that Van Gogh wrote to his brother about the Portrait of Dr. Gachet .
" There were other concerns as well that affected Van Gogh at that time : the illness of Theo 's baby , Theo 's health and employment issues , potential loss of Theo 's support and the destruction of his relationship with Dr. Gachet who was meant to manage Van Gogh 's health and be a stabilizing influence .