All sunshine makes a desert

अतिदानाद्बलिर्बद्धो
ह्यतिमानात्सुयोधनः ।
विनष्टो रावणो लौल्यात्
अति सर्वत्र वर्जयेत् ॥

Excessive generosity lead to the capture of Bali.
Excessive pride lead to the downfall of Suyodhana.
Excessive infatuation lead to the destruction of Ravana.
Thus, excess should be avoided in every aspect.

All sunshine makes a desert.
Too much of anything is good for nothing.