。
Absence makes the heart grow fonder.
Literal
Separating seeing [conditional-みれば] respect [topic-は] increases.
離れてみれば尊敬は増す is the Japanese rendering of 'absence makes the heart grow fonder' — though with 尊敬 (respect) rather than love. ~てみれば (if one tries being apart) uses the conditional of ~てみる.