Rumi's Masnavi - Love is drawing the bitter ones to the sweet, because the foundation of (all) loves is righteousness.

Love is drawing the bitter ones to the sweet, because the foundation of (all) loves is righteousness. 2580

مهر تلخان را به شیرین می‌‌کشد ** ز آن که اصل مهرها باشد رشد

Wrath is carrying away the sweet one to bitterness: how should the bitter sort with (be suited to) the sweet?

قهر شیرین را به تلخی می‌‌برد ** تلخ با شیرین کجا اندر خورد

The bitter and the sweet are not visible to this (ocular) sight, (but) they can be seen through the window of the latter end.

تلخ و شیرین زین نظر ناید پدید ** از دریچه‌‌ی عاقبت دانند دید

The eye that sees the end (ákhir) can see truly; the eye that sees (only) the stable (ákhur) is delusion and error.

چشم آخر بین تواند دید راست ** چشم آخر بین غرور است و خطاست‌‌

Oh, many the one that is sweet as sugar, but poison is concealed in the sugar.

ای بسا شیرین که چون شکر بود ** لیک زهر اندر شکر مضمر بود

He that is more sagacious (than the rest) will know it by the smell; another (only) when it touches his lips and teeth: 2585

آن که زیرک‌‌تر به بو بشناسدش ** و آن دگر چون بر لب و دندان زدش‌‌

Then his lips will reject it before (it reaches) his throat, although the Devil is shouting, “Eat ye!”

پس لبش ردش کند پیش از گلو ** گر چه نعره می‌‌زند شیطان کلوا

And to another it will declare (itself) in his throat, while to another it will unmask in his body;

و آن دگر را در گلو پیدا کند ** و آن دگر را در بدن رسوا کند

And to another it will give burning pain in evacuation: its taste will deal him a blow that pierces his liver.

و آن دگر را در حدث سوزش دهد ** ذوق آن زخم جگر دوزش دهد

And to another (it will become manifest) after days and months; and to another after death, from the depth of the grave;

و آن دگر را بعد ایام و شهور ** و آن دگر را بعد مرگ از قعر گور