  We show that an explicit construction of a four-dimensional de Sitter space
may be performed using a diagrammatic approach via nodal diagrams emanating
from the path integral representation of the Glauber-Sudarshan state. Sum of
these diagrams typically leads to an asymptotic series of Gevrey kind which can
then be Borel resummed, thus reproducing the non-perturbative structure of the
system. Our analysis shows that four-dimensional de Sitter space is not only
possible in string theory overcoming the no-go and the swampland criteria --
albeit as a Glauber-Sudarshan state -- but it may also be non-perturbatively
stable within a controlled temporal domain. Somewhat consistently, the Borel
resummation of the Gevrey series provides strong hint towards the positivity of
the cosmological constant.
