Time t, or linear, or mathematical time, and or its possible extensions by adding some kind of measure of duration, or of fading retentions and protensions, does not suffice to account for living time. This is because the inner connectedness of time, even merely that it can seem to flow, can make music possible, exceeds schematisations that are based in presentness. Without such schematisations aren't you reduced to circularity? But that is where you start from, before any schemes can be imagined. There can be no limit to the inner connectedness of time that could be expressed in temporal terms. Everything Eliot says in the 'Four Quartets' in a tentative and speculative tone must be literally true. The hour of birth and the hour of death are the same and ever-present.