Each of these critics agree in the essence of the Sonnet and its portrayal of what love really is and what it can withstand, for example, the test of time and the fading of physical attraction of the object of our love.
All of these critics concur in the essence of the Sonnet and its depiction of what love truly is, including its ability to withstand tests of time and the waning of physical attraction towards the object of one's affection.