People have to be given the freedom to show the heart they possess. I think it's a leader's responsibility to provide that type of freedom. And I believe it can be done through relationships and family. Because if a team is a real family, it's members want to show you their hearts.
Leading with the Heart: Coach K's Successful Strategies for Basketball, Business, and Life (ed. Grand Central Publishing, 2010) - ISBN: 9780446537001