In business, your most powerful tool isn’t a strategy, a spreadsheet, or a vision. It’s your words.

The way you speak to your team shapes everything: your culture, your loyalty, the care your employees show one another, the way they treat your customers—even the quality of your product.

In Be Kind, Gui Costin shows that leadership language is not soft. Thoughtful words can drive a hard-charging, high-performance culture without breeding burnout, fear, or toxicity. Speaking with clarity, respect, and intent builds an environment where people feel valued, trusted, and understood.

This book is both a call to action and a practical guide. Learn to choose words that strengthen trust, inspire accountability, and cultivate a workplace where kindness and performance go hand in hand. Because in the end, every word you speak either builds up your culture, or tears it down.

High performance starts with how you speak. Be thoughtful. Be clear. Be Kind.