Analysis of His poetry his pillar

Only a little more
I have to write:
Then I'll give o'er,
And bid the world good-night.

'Tis but a flying minute,
That I must stay,
Or linger in it:
And then I must away.

O Time, that cut'st down all,
And scarce leav'st here
Memorial
Of any men that were;

--How many lie forgot
In vaults beneath,
And piece-meal rot
Without a fame in death?

Behold this living stone
I rear for me,
Ne'er to be thrown
Down, envious Time, by thee.

Pillars let some set up
If so they please;
Here is my hope,
And my Pyramides.