אַל־תַּחְמֹ֣ד יָ֭פְיָהּ בִּלְבָבֶ֑ךָ וְאַל־תִּ֝קָּֽחֲךָ֗ בְּעַפְעַפֶּֽיהָ׃
Lust not after her beauty in thy heart; Neither let her captivate thee with her eyelids.
Read kabbalistic (mystical) interpretation of Proverbs 6:25: and classical mystical sources.