an C18th poem about contentment in God alone

I do not know
when I have had happier times
in my soul
than when I have been sitting at work,
with nothing before me
but a candle and a white cloth,
and hearing no sound
but that of my own breath;
with God in my soul
and heaven in my eye.
I rejoice in being exactly what I am
- a creature capable of loving God,
and who, as long as God lives,
must be happy.
I get up
and look a while out the window.
I gaze at the moon and stars,
the work of an Almighty Hand.
I think of the grandeur of the universe
and then sit down
and think myself
one of the happiest
beings in it