The central idea of the poem "My mother at sixty six" is 'ageing', the inevitable law of the creation. It doesn't matter if an object is living or non-living, everything is tend to change. Human beings are no exception. We call it ageing. From a zygote to a corpse, we go through different stages of life. Death is the final stage - we know it but still feel sorry on the death of close ones. The speaker of this poem is a daughter. Her mother is now sixty six years old. The poet can feel that her mother's death is approaching near. This thought hurts her. It hurts every offspring. So, the intimacy of mother-daughter relationship is also an important aspect of this poem. Although the thought of aged mother's death comes into mind and hurts but the poet bids goodbye to her mother by smiling. Most probably the smile is false. But smiling is the only measure to accept the life as it is despite of all its limitations, ageing and death.