Kelly Grovier reviews Agnes Martin at Tate Modern, on view through October 11, 2015.

Grovier writes: "Ghosting among these diaphanous canvases, room by room, one’s eyes are slowly heightened to the uplifting paradox that undergirds Martin’s artistic conviction: apprehension of life’s beauty and its intensities does not require a retinal mimicry of physical forms in the here-and-now, but a luminous distillation of invisible harmonies and mysterious proportions. Though they may have required for their exacting execution the fragility of a mind as brittle and punctilious as Martin’s, the power of her paintings is that of a sublime symphony: their mute melodies as meticulously wrought as they are effortlessly imbibed by the ear of the eye."