Born in 1912, and having long outlived all her con-temporaries of the Abstract Expressionist generation, Agnes Martin has created a four-decade-long body of work that could equally be described as ahead of its time and as timeless. In the mid-1960s, Martin was applauded as a herald of the cool geometric Minimalism that was emerging in the aftermath of Abstract Expressionism, but she herself declined that claim, for she saw the Minimalist approach as impersonal and dispassionate. Her own abstractions use a combination of ideal geometry and the lightest touch of the artist’s hand to achieve a pitch of emotion and feeling…