How does Shakespeare show the transience of natural object in his Sonnet-18? / “And every fair from fair sometime declines”—Explain the line

Ans: In the sonnet “Shall I compare thee to a summer’s day” the poet William Shakespeare displays a very tragic truth of every natural object. He gets a realization that every natural object that may have extraordinary beauty or strength is very transient in the time field of the universe. Everything is fated to end or decay by the impact of ‘Time’. In support of this, the poet mentions few examples like summer, May’s beautiful bud, sun. According to the poet, summer session may be very pleasant but its duration is very short. The short span of May’s beautiful bud also directs the transience of nature’s beauty. Even the all-important sun does not always remain constant in its brightness. So the poet, in this sonnet, actually means to say that “every fair from fair” thing will lose its beauty 'by chance, or nature's changing course'.