"While others were advocating for freedom by 'any means necessary,' including violence, Martin Luther King Jr. used the power of words and acts of nonviolent resistance, such as protests, grassroots organizing, and civil disobedience to achieve seemingly impossible goals," according to The King Center.

Every year we honor the legacy of Martin Luther King Jr. in January. Here's everything you need to know about the holiday.

Celebrate Martin Luther King Jr.'s legacy with a look back at 15 of his most powerful quotes, including the iconic 'I Have a Dream' speech and more.