Simplicity...
consists in doing everything for love of
God and having no other aim
in all our actions but His glory. All the acts of this virtue consist
in
saying things simply, without duplicity or subtlety, being
straightforward, with no evasion or subterfuge. So then, simplicity
means
doing everything for love of God, rejecting any admixture,
because
simplicity implies the absence of any composition. (22
August 1659; SV XII, 246)