A leader demonstrates integrity by

A leader demonstrates integrity by doing the right thing even when no one else is around to witness it. 

A leader does not only need to have integrity to become successful. He must also be respectful, reliable, courageous, positive, motivational, and sincere. He must also be a visionary in the sense that he already envisioned what his organization will become under his leadership.

A successful leader not only increases his value of self but also those people under his leadership. He must also serve as an inspiration for people under his leadership to become a better version of themselves.