Pride goes before a fall

यदा किञ्चिज्ज्ञोहं द्विप इव मदान्धः समभवम्
तदा सर्वज्ञोस्मीत्यभवदवलिप्तं मम मनः ।
यदा किञ्चित्किञ्चिद्बुधजनसकाशादवगतम्
तदा मूर्खोस्मीति ज्वर इव मदो मे व्यपगतः ॥

- नीतिशतकम्

When I was ignorant, I was blinded by pride like an intoxicated elephant. My mind was elated and I used to think myself to be all-knowing. However, by keeping company with the wise, my pride was humbled like fever, as I gradually realized that I am an idiot.

Pride goes before a fall.
A little learning is a dangerous thing.